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Devansh Saxena
Subject: Physics
, asked on 20/4/15
a particle is projected horizontally with a speed u from the top of a plane inclined at an angle theta with the horizontal .how far the point of projection will the particle strike the plane
Answer
1
Yashsrivastava
Subject: Physics
, asked on 16/5/15
MCQ.
A particle accelerates from rest with aceleration 5m/s
2
. After sometime, particle moves with constant velocity. Then it decelerates with 5m/s
2
and finally comes to rest. In whole of journey it takes 25 sec. and the average speed in journey is 72 km/hr. Then
(A) THE TIME INTERVAL DURING WHICH IT HAS MOVED WITH CONSTANT VELOCITY IS 15sec.
(B) THE MAXIMUM VELOCITY IS ACQUIRED BY IT IS 25m/s.
(C) THE TIME INTERVAL DURING WHICH IT HAS MOVED WITH CONSTANT VELOCITY IS 25sec.
(D) THE MAXIMUM VELOCITY IS ACQUIRED BY IT IS 30m/s.
(according to the book both a and b is correct). but the problem is no solution is given... plz help
Answer
1
Varun
Subject: Physics
, asked on 12/5/15
a spotlight s rotates in a horizontal plane with a constant angular velocity of 0.1 radians/s. the spot of light P moves along the wall at a distance of 3 m. the velocity of the spot P when theta=45 degree is __________ m/s.
Answer
1
Karthik Kumar
Subject: Physics
, asked on 29/1/15
very urgent
A stone is released from an elevator going up with an acceleration a. The acceleration of the stone after the release is
Answer
1
Vaibhav Garg
Subject: Physics
, asked on 5/11/16
A particle starting from rest moves in a straight line with acceleration shown in graph. Find distance(in m) travelled by particle in first four seconds of its motion.
Answer
1
Rahul Rai
Subject: Physics
, asked on 29/6/15
at what two forces (p+q) and (p-q) act so that resultant is -
1] 3p
2
+q
2
the whole root.
2]2(p
2
+q
2
)the whole root.
3](p
2
+q
2
)the whole root.
Answer
1
Kamal Sharma
Subject: Physics
, asked on 20/6/15
a ball is dropped from a building of height 45m . simultaneously another ball is thrown up with a speed of 40m/s. calculate the relative speed of balls as a function of time.
Answer
1
Jai Singh
Subject: Physics
, asked on 26/5/16
A projectile is thrown in upward direction making an angle of 60 with horizontal with a velocity of 150 m/sec .time after which its inclination with horizontal is 45???
Answer
2
Awadhesh Thakkar
Subject: Physics
, asked on 30/3/17
a man can swim at a speed 2m/s in still water. he starts swimming in a river at an angle 150 to the direction of water flow and reaches the directly opposite direction on the opposite bank.\
find the speed of flowing water.
if width of river is 1km then find time taken to cross the river
Answer
1
Oswashbukler .
Subject: Physics
, asked on 30/7/17
A swimmer crosses a river with minimum possible time 10 second. And when he reaches the other end starts swimming in the direction towards the point from where he started swimming. Keeping the direction fixed the swimmer crosses the river in 15 sec. The ratio of speed of swimmer with respect to water and the speed of river flow is?
Answer
1
Vidushi Kaushik
Subject: Physics
, asked on 25/1/16
A ball is projected vertically upward with a certain initial speed. Another ball of same mass is projected at an angle of 60° with the vertical with the same initial speed. At highest point of their journey , the ratio of their potential energies will be
Answer
4
Shivam
Subject: Physics
, asked on 29/11/14
a coin is released inside a lift at a height 2m from floor of lift. the height of lift is 10m. the lift is moving downward with acceleration 11m/s
2
. the time after which the coin will strike the lift is?
Answer
6
Upasana Dey
Subject: Physics
, asked on 1/7/15
A particle is projected from O at an angle alpha with the horizontal. After t seconds it has an elevation beta as seen from the point of projection. Prove that its initial velocity is [gt cos beta]/[2 sin(alpha - beta)]
Answer
1
Rani Kumari
Subject: Physics
, asked on 20/6/17
A motor boat is to reach at a point 30 degree upstream on other side of a river flowing with velocity 5 m/s.Velocity. of motor boat with respect to water is 5m/s.The driver should steer the boat at an angle:
Answer
3
Hrushikeshchoudhury
Subject: Physics
, asked on 29/8/15
A grasshopper can jump Maximum distance 1.6m.it spends negligible time on the ground .how far can it go in 10second?
Answer
8
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What are you looking for?
A particle accelerates from rest with aceleration 5m/s2. After sometime, particle moves with constant velocity. Then it decelerates with 5m/s2and finally comes to rest. In whole of journey it takes 25 sec. and the average speed in journey is 72 km/hr. Then
(A) THE TIME INTERVAL DURING WHICH IT HAS MOVED WITH CONSTANT VELOCITY IS 15sec.
(B) THE MAXIMUM VELOCITY IS ACQUIRED BY IT IS 25m/s.
(C) THE TIME INTERVAL DURING WHICH IT HAS MOVED WITH CONSTANT VELOCITY IS 25sec.
(D) THE MAXIMUM VELOCITY IS ACQUIRED BY IT IS 30m/s.
(according to the book both a and b is correct). but the problem is no solution is given... plz help
A stone is released from an elevator going up with an acceleration a. The acceleration of the stone after the release is
1] 3p2+q2the whole root.
2]2(p2+q2)the whole root.
3](p2+q2)the whole root.
find the speed of flowing water.
if width of river is 1km then find time taken to cross the river