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Prithesh Dwivedi asked a question
Subject: Physics, asked on on 20/5/16

A particle is moving in a circle of radius R with constant speed . The time period of particle is T=1 Second in a time t = T/6 , If the difference between average speed and magnitude of average velocity of the partical is 2m/sec, find the radius of the circle(in meteres)
Amiya Nath Sharma asked a question
Subject: Physics, asked on on 10/7/16
a body is thrown up in a lift with a velocity 'u' relative to lift and the time of flight is found to be 't'. the acceleration with which the lift is moving up is...
Almas asked a question
Subject: Physics, asked on on 19/12/16
A point moves in a straight line under the retardation av2 . If the initial velocity is u, the distance covered in 't' seconds is 
a) aut
b) 1/a ln(aut)
c) 1/a ln(1+aut)
d) aln(aut)
Krishna Vamsi asked a question
Subject: Physics, asked on on 14/7/16
a particle is projected from a point p(2,0,0)m with a velocity 10m/sec at an angle 45 degrees eith the horizontal the plane of projectile motion passes through a horizontal line pq which makes an angle 37 degrees with positive x-axis ,xy plane is horizontal.the coordinates of the point where the particle will strike the line pq is
Rashmika B asked a question
Subject: Physics, asked on on 20/2/17
↵A uniform rod of mass m and length L is free to rotate in the vertical plane about a horizontal axis passing through its end. The rod is released from rest in the position shown by slightly displacing it clockwise. Find the hinge reaction at the axis of rotation at the instant the rod turns through 90 degree and 180 degree
Devashish asked a question
Subject: Physics, asked on on 6/7/17
2 particles P and Q are moving with constant velocities ( i + j ) m/s and (-i + 2j) m/s respectively.At time t=0, P is at origin and Q is at a point with position vector (2i + j) m. If the equation of the trajectory of Q as observed by P is x+2y=n find n
Krishna Vamsi asked a question
Subject: Physics, asked on on 14/7/16
a stone is projected from point a with speed u making an angle 60 degrees with the horizontal.the fixed inclined surface makes an angle 30 degrees with the horizontal.the stone lands at b after time t.then the distance ab=
Bala asked a question
Subject: Physics, asked on on 27/5/16
sir,i'am new for CBSE.I don't know physics basis.
what I have to do?
Monobikash Deb asked a question
Subject: Physics, asked on on 10/6/16
The displacement of a particle undergoing rectilinear motion along x-axis is given by X=2t​3+21t2+60t+6 where X is in meter And t is in second . find the acceleration of the particle when its velocity is zero ?
Neha Jain & 1 other asked a question
Subject: Physics, asked on on 5/6/17
A target is made up of two plates, one wood and the other of iron. The thickness of the wooden plate is 4 cm and that of iron plate is 2 cm. A bullet fired goes through of the wood first and then penetrates 1 cm into iron. A similar bullet fired with same velocity from opposite direction goes through iron first and then penetrates 2 cm into wood. If a1 and a2 be the retardations offered to the bullet by wood and iron plates respectively, determine the relation between a1 and a2
Manideep Varma asked a question
Subject: Physics, asked on on 18/11/16
at certain temperature,the r m s velocity for o2 is 400m/sec.at the same temperature,the r m s velocity for h2 molecules will be?
Prithesh Dwivedi asked a question
Subject: Physics, asked on on 20/5/16
A particle is projected  with a velocity u at an angle thyta with the horizontal . find the radius  of the  parabola traced out by the particle  at the point  where velocity makes an angle thyta/2 with the horizontal.
Krishna Vamsi asked a question
Subject: Physics, asked on on 24/6/16
the body starting from rest moving with uniform acceleration has a displacment of 16m in the first 4 sec and 9m in the first 3 sec.the acceleration of the body is
Prithesh Dwivedi asked a question
Subject: Physics, asked on on 20/5/16
Q: a particle  is going  in a spiral  path  with constant speed
a) The velocity of the  particle  is  constant
b) The acceleration of the particle  is constant
c) The magnitude of acceleration is constant.
c) The magnitude  of acceleration  s decreasing continuously.
Varun Gupta asked a question
Subject: Physics, asked on on 25/5/17
A ball is thrown vertically upwards. It was observed at a height h twice with a time interval deltat. Find the initial velocity in terms of g, h and deltat
Krishna Vamsi asked a question
Subject: Physics, asked on on 14/7/16
a particle is projected from surface of the inclined plane with speed u at an angle theta with the horizontal.after some time the particle collides elastically with smooth fixed inclined plane for the first time and subsequently moves in vertical direction.starting from projection.find the time taken by the particle to reach maximum height
Deva Aadiseshan.k asked a question
Subject: Physics, asked on on 5/9/16
A machine gun is mounted on the top of a tower 100m high. At what Angle should the gun be inclined to cover a maximum range of firing on the ground below? The muzzle speed of the bullet is 150ms-1.
Maaz Ahmad asked a question
Subject: Physics, asked on on 2/8/17
A stone thrown upwards at u attains maximum height h.Another stone thrown upwards from the same point at 2u attains maximum height. find OUT H/h
Prithesh Dwivedi asked a question
Subject: Physics, asked on on 21/5/16

Q: The position vector  of a particle  in a circular motion about  the origin sweeps out equal area in equal  time is ?
Priyanshi asked a question
Subject: Physics, asked on on 6/10/17
Q. A particle is projected at an angle θ = 30° with the horizontal. Which of the following curves best represents the variation of kinetic energy and gravitational potential energy as a function of time?
{Take the horizontal as the reference level for the gravitational potential energy.}
(1)


(2)


(3)


(4)

Krishna Vamsi asked a question
Subject: Physics, asked on on 17/7/16
a particle moves with velocity 4i and another particle b moves with a velocity -3j.find vab,vba and their magnitude
Almas asked a question
Subject: Physics, asked on on 4/10/16
 a projectile is fired vertically at an angle theta from ground with velocity v. speed of projectile when it is moving at an angle delta from horizontal is ​  
Siddhant Kole asked a question
Subject: Physics, asked on on 20/7/17
A body is in rectilinear motion with a acceleration given by a=2v​3/2. If the particle starts its motion fro origin with velocity of 4m/s, the position x of the particle at an instant terms of v can be given as
Manasi Mujumdar asked a question
Subject: Physics, asked on on 21/5/16
​A SWIMMER SWIMS ACROSS A 2 KM WIDE RIVER BY KEEPING 150 DEGREE WITH FLOW OF RIVER. THE RIVER FLOWS WITH 2KM/H AND THE SPEED OF THE SWIMMER IN STILL WATER IS 3KM/H. FIND THE TIME HE TAKES TO CROSS THE RIVER.
PLS XPLAIN IN DETAIL WITH A DIAGRAM
Devashish asked a question
Subject: Physics, asked on on 20/7/17
a person standing on the roof of a 40 m high tower, throws a ball vertically upwards with speed 10m/s. 2 seconds later, he throws another ball again in vertical downward direction(g=10m/s^2) if both hit the ground simultaneously, then choose the correct options.
a) the first ball hits the ground after 4 seconds.
b) the second ball was projected vertically downwards with speed 5m/s.
c) the distance travelled by the first ball is 10 m greater than the distance travelled by the second ball.
d) both balls hit the ground with same velocities.
Jasleen Sandhu asked a question
Subject: Physics, asked on on 9/6/17
The driver of a car slams on the brakes when he sees a tree blocking the road. the car slows uniformly with an acceleration of - 5.6m/s2 for 4.2s, making the straight skid marks 62.4m long ending at the tree. With what speed does the car then strike the tree?
 
Mukul Agrawal asked a question
Subject: Physics, asked on on 11/7/16
The coordinates of a moving particle at any time t are (10cos5t,10sin5t). the speed of the particle is
Bloom asked a question
Subject: Physics, asked on on 6/8/17
​A particle is projected with velocity 2√(gh) ,so that it just clears two wall of equal height h which are at a distance of 2h from each other.show that the time of passing between the walls is 2√(h/g)...... HOW DO I SOLVE THIS QUESTION USING EQUATION OF TRAJECTORY?
Dhruvin Pandya asked a question
Subject: Physics, asked on on 12/8/18
A particle is performing a uniform circular motion. Which is the wrong statement regarding its motion?
A)The velocity vector is tangential to the circle
B)The acceleration vector is tangetial to the circle
C)The acceleration vector is directed towards the centre of the circle
D)The velocity and acceleration vectors are perpendicular to each other
Medha asked a question
Subject: Physics, asked on on 16/7/16
An object is thrown vertically upwards in such a way that it has a speed of 19.6m/s when it reaches one half its maximum altitude what are (a) its maximum altitude (b) its velocity 1 sec after is thrown and (c) its acceleration when it reaches its maximum altitude.

please answer as soon as possible!!
Uma asked a question
Subject: Physics, asked on on 22/5/18
A balloon is ascending at the rate of 14 m/s. A stone dropped from it is found to take 6.1 seconds to reach the ground. Find the height of the balloon at the time of dropping the packet and velocity with which it hits the ground?
Priyanshi asked a question
Subject: Physics, asked on on 29/6/17
Madam X is at point A(1,2,3).now in search of a diamond neckless she moves in direction i+j+root 2k. after moving 10m , she reaches a point B. she gets the clue for her diamond and reaches point C(6,7,8). her speed is constant in whole path is 20m/s.
The coordinate of point B is
Dhruvin Pandya asked a question
Subject: Physics, asked on on 1/10/18
Velocity-time graph of a particle moving in a straight line as shown in the figure. Att= 0,x= +10 m. In which region particle is moving towards the origin?
Options:
ABandBC
BCandDE
BCandCD
CDandDE
Prince Second asked a question
Subject: Physics, asked on on 31/5/16
Particles P and Q are in motion. Particle P is moving with a veloctiy of 10root3 km/hr towards west, and particle Q is moving with a velocity of 10 km /hr towards north. If the initial distance between the two particles is 20 km, then calcate the shortest distance between the particles.??
Ipsita Dash asked a question
Subject: Physics, asked on on 15/8/17
the velocity (v) of a body moving along positive x-direction varies with displacement (x) as v=krootx, where k is a constant . Determine how (v) varies with time (t) . Also , find the variation of x and t.
Mukul Agrawal asked a question
Subject: Physics, asked on on 11/7/16
A ball is dropped from a building of height h. Simultaneously another ball is thrown up from the ground with a velocity such that it can reach upto a height 5h. Find the time at which the two balls would cross each other.
Mukul Agrawal asked a question
Subject: Physics, asked on on 11/7/16
​​A particle is projected from a horizontal plane (x-z plane) with a velocity, v=3i + (25-75t)j m/s. its range on the horizontal plane will be
Rashmika B asked a question
Subject: Physics, asked on on 11/8/16
a projectile is projected at an angle theta with the horizontal,if T is the time of flight and R is the horizontal range,then prove
T=sqrt(2Rtantheta/g) tantheta=gT^2/2R
Shubhrajyoti Ghosh asked a question
Subject: Physics, asked on on 18/9/16
A train starts at a station and stops at another station. First the velocity of the train increases at a uniform rate, reaches a maximum velocity v and then starts decreasing at a constant rate. If the time spent for the entire journey is t, prove that the distance between the entire station is 1/2vt.
Bhavya Arora asked a question
Subject: Physics, asked on on 11/10/17
Find A vector. B vector if modA vector=2 and modB vector =5 and mod of cross product of vector A and vector B=8
Monobikash Deb asked a question
Subject: Physics, asked on on 10/6/16
In the case of uniformly accelerated motion along a straight line , why do we write average velocity = (u+v)/2 , where u =initial velocity and v = final velocity .
Jasleen Sandhu asked a question
Subject: Physics, asked on on 9/6/17
a rapidly growing plant doubles in height each week. at the end of 25th day, the plant reaches the height of the building. at what time was the plant one-fourth the height of the building?
Elena Gupta asked a question
Subject: Physics, asked on on 18/4/16
does the "speed" change in a uniform circular motion ........
if yes ??? i think it is scalar and change in direction wont make any change
Prakhar Pandey asked a question
Subject: Physics, asked on on 16/7/16
a car travels half thhe distance with constant velocity of 40 kmph and the remaining half with a constant velocity of 60kmph.the average velocity of the car in kmph is    ​
Shubhrajyoti Ghosh asked a question
Subject: Physics, asked on on 18/9/16
Starting from rest, a body moves at first witha constant accelaration a. Then it moves with a uniform velocity and finally with a constant retardation a before coming to rest. If the displacement is s, and time taen is t, prove that the body was in motion with constant velocity for a time interval of root[(t2-4s)/a].
Pianist asked a question
Subject: Physics, asked on on 10/7/17
Explain me the highlighted part.
Divyansh Bansal asked a question
Subject: Physics, asked on on 16/5/17

A hemispherical bowl of radius 10 m rotates about its vertical axis with an angular velocity 1.4 rad/s. A point particle of mass 10-2 kg placed on the smooth inner surface of the bowl, also rotates with the same speed. The particle is at a height h from the bottom of the bowl. Find the height of the particle.

 

 

 
Prince Second asked a question
Subject: Physics, asked on on 30/5/16
Experts please help me...I am so much confused and tensed related to this kinematics part?? please help me . I had read the text, and understood the concepts and equations but when I switched for practice part of numericals, I am not able to solve them?? please help me??
Maaz Ahmad asked a question
Subject: Physics, asked on on 1/8/17
a ball is dropped from the top of a building if it covers second half of a building in 1 second. Find out height of the building
Greeshma V S asked a question
Subject: Physics, asked on on 1/6/16
  1. ​​if acceleration is varying with time we does not use kinematics equation,.we will use this equation for constant acceleration why plzexplain?
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