How to read log & anti log table??????

if we hang a magnet in front of an iron car will it move ? give reason with suitable answer.

 what is triangle law of vector addition

what is polar vector and axial vector?

forces i^ + j^ - 2k^, (2i^-j^+k^), (3i^-j^+4k^),(4i^-2j^+3k^) act on a body simultaneously.the resultant force has a magnitude of...

the speed of a projectile when it is at its greatest height is root(2/5) times its speed at half the max height . what is the angle of projection ?

Define centripetal acceleration. Derive an expression for the centripetal acceleration of a particle moving with uniform speed v along a circular path of radius r.discuss the direction of this acceleration

Derive relation between linear velocity and angular velocity

The 200 N force is to be resolved into components along the lines a-a' and b-b'.

(a) Determine the angle P by trigonometry knowing that the component along a-a' is 150 N.

(b) What is the corresponding value of the component along b-b'?

answer: (a) 103.0 degrees (b) 276 N

Please help me with the solution.

how to use a log book to find natural sines and natural cos ?

Any Vector A is given by A = xi + yj. The another vector B perpendicular to A can be written as

The relation between time(t) and distance(x) is t=Ax^2 + Bx, A and B are constants. Prove that its retardation is 2Av^3.

The velocity of a particle moving in straight line depends on its position as v= 3sin [(pi /2) + x ] m/s. Find the acceleration of the particle when at x = pi / 4. (Ans : -9/2 m/s)

A person moves 30m north then 20m east and finally 30 root 2 m south west .find the displacement from original position

The resultant of two vectors A and B is perpendicular to vector A and its magnitude is equal to half the magnitude of vector B ,Find the angle between A and B?

A particle is moving along a circular path of radius 5m with a uniform speed of 5m/s. What will be the average acceleration when the particle completes the half revolution? (Ans : 10/pi m/s)

discuss the condition for the maximum range of the projectile.Show that for a given velocity of projection, there are two angles of projection which give the same range of projectile ?

A particle is projected vertically upwards from point A on the ground. It takes t1 time to reach a point B but it still continues to move up. If it takes further t2 time to reach the ground from point B then height of point B from the ground is :

A) 1/2*g*(t₁ +t₂)²

B) gt₁t₂

C) 1/2*g*(t₁ + t₂)²

D) 1/2*g*t₁ t₂

Xplain the solution.........

define positive,negative and zero work with examples

on a particular day, raindrops are falling vertically at a speed of 5m/s. a man holding a plastic board is running to escape from rain. the lower end of board makes 45 degree angle with the horizontal and is at a height equal to half that of man . the maximum speed of the man so that his feet do not get wet is ___?

satae and explain polygon law of vectors

 Can you prove that path of a projectile is a parabola....???

2. Two vectors, both equal in magnitude, have their resultant equal in magnitude of the either. Find the angle between the two vectors.

OR

Two equal forces have their resultant equal to either, what is the inclination between them?

A cricketer can throw a ball to a maximum horizontal distance of 100m. How much high above the ground can the crickter throw the same ball?

a projectile is thrown horizontally from top of a tower strikes the ground after 3sec at an angle 45⁰ with horizontal.find height of tower and speed which body was projected.{g=9.8m/s²}

1.a bullet fired from a rifle,attains a maximum height of 25m and crosses a range of 200m.find the angle of projection.

2.find the range of ball,which when projected with a velocity of 29.4 m/s just passes over a pole 4.9 m high.

3.a projectile is thrown from a point 39.2 m away from the foot of a building 19.6m high and just reaches the top horizontally .find the velocity of projection and the angle of throw.

Two forces acting on a particle in opposite directions have the resultant of 10N. If they act at right angles to each other, the resultant it 50N. Fing the 2 forces.

a motor boat is racing towards north at 25km/h & the water current in tht region is 10 km/h in d direction of 60 degree east of south . find d resultant velocity of boat ............

my question is how do we know frm where we have to take angle ......... plzzz xplain me ... i hv xam tomorrow.......

the ceiling of a long hall is 25 m high . what is the maximum horizontal distance that a ball thrown with a speed of 40 m/s can go without hitting the ceiling of the hall ?

 what are the examples of non localised vectors? pls help ...

A man can swim in still water at a speed of 3km/h . He wants to cross a river that flows at a speed of 2 km/h and reach a point directly opposite to the starting point.

1. In what direction should he try to swim ?

2. How much time will he take to cross the river if the river is 500 m wide ?

Rain is falling vertically with a speed of 35m/s . winds starts blowing after sometime with a speed of 12m/s in east to west direction . In which direction . In which direction should a boy waiting at a bus stop hold his umbrella ? this question was answered wrong by an expert i need d correct answer and explanaton for this :(

can there be motion in two dimensions with an acceleration only in 1 D? show this with eg.

One second after projection a stone moves at an angle of 45 degree with the horizontal. Two seconds after projection it moves horizontally .Then what is the angle of projection of the projectile?

show that path of a projectile is a parabola.

a projectile is fired horizontal with a speed 98m/s from the top of hill 490m height. find

1. velocity in which it strikes the gournd .
2. time taken to reach the gournd.
3. distance of the target from the hill.

Which of the following pairs of displacements cannot be added to give a resultant displacement of 2m?

1. 1m+1m

2. 1m+2m

3. 1m+3m

4. 1m+4m

Obtain the component of vector A=2i+3j in the direction of vector i+j.

if vector r1= 4m along north east and r2 vector = 2m due north, find vector mgnitude r1 + r2 and r1 - r2.

A length S is divided into n equal parts, at the end of which, the acceleration of a moving point is increased by f/n. Find the velocity of the poin after describing the distance s given that the particle started from rest with acceleratin f. EXPLAIN

find the magnitude and direction of the resultant of two vectors A and B in terms of their magnitudes and angle O between them..

a ball is dropped from the roof of a tall building and simultaneously another ball is thrown horizontally with some velocity from the same roof.which ball lands first?explain your answer.

A hiker stands on the edge of a cliff 490 m above the ground and throws a stone horizontally with an initial velocity of 15 m/s.Neglecting air resistence,find the time taken by the stone to reach the ground and the speed with which it hits the ground.(g=9.8 m/s).Please provide the answer for this question.

Prove that the maximum horizontal range is 4 times the max height attained by the projectile fired at an inclination so as to have maximum horizontal range

the equation of projectile is y = ax - bx2 . its horizontal range is?

Two balls A and B are thrown with same speed u from the top of a tower .Ball A is thrown vertivally upwards and ball B is thrown vertically downwards.If time taken taken by the ball A and ball B to reach the ground are 6 and 2 sec Respectively.

Find the distance travelled by ball in t=3 s.Ans=25 m

Find the height of the tower.Ans=60 m

A projectile is thrown into space so as tohave a max. possible horizontal range of 400mts. Taking the point of projection as the origin, the co-ordinates of the point where the velocity of the projectile is minimum are? can you show how to solve it?

An object is projected with velocity v₀=15i^ +20j^. Considering x along horizontal axis and y along vertical axis. Find its velocity after 2 seonds.

when two vectors A and B inclined at an angle theta act on a body, the resultant is (2k-1)under root(A^{2_{+B2).when the vectors are inclined at an angle (90-theta),the resultant is(2k-1)under root A2+B2,thenprove that.............tan (theta)=k-1/k+1}}

If A=3i+4j and B=7i+24j then find the vector having the same magnitude as B and same direction as A.

an electron travelling with a speed of 5 X 10^-3 m/s passes through an lectronic field with an acceleration of 10¹² m/s² how long will it take for the electron to double its speed?

a body thrown vertically up with initial velocity 52 m/sec from the ground passes twice a point at H height above at an interval of 10 s . The height H is (Take g= 10)

Two particles A and B start moving with velocities 20m/s and 30√2m/s along x-axis and at an angle of 45 degree with x-axis respectively in xy - plane from origin. what is the relative velocity of B w.r.t A ?

two paper screens A and B Are seperated by a distance of 100m. A gullet penetrates A and B at points P AND Q respectively. Where Q is 10 cm below P. If bullet is travelling horizontally at the time of hitting A the velocity of bullet ar A is nearly how much?Help experts

a PARTICLE IS PROJECTED FROM GROUND WITH SPEED 80 m/s AT AN ANGLE 30 DEGREE WITH HORIZONTAL FROM GROUND .THE MAG NITUDE OF AVERAGE VELOCITY OF PARTICLE IN TIME T=2SEC TO T=6SECS IS?

Two equal forces F have a resultant of 1.5 F. Find the angle between the forces

A particle starts from origin t=0 with a velocity 5.0 ^i m/s and moves in x-y plane under action of a force which produces a constant acceleration of (3.0 ^i + 2.0^j) m/s squ.

a) What is the y coordinate of the particle at the instant its x coordinate is 84m?

b)What is the speed of the particle at this time?

Please help! :o

what does (ds/dt)² (d²s/dt²⁾ represent

If vector A and B are two non collinear unit vectors and if |A+B|=, then find the value of (A-B).(2A+B)

Please help! :O

Forces 3P,7P and 5P act at a point paralell to the sides AB,BC and AC of the equilateral triangleABC.Find the magnitude and direction of the resultant.

A PROJECTILE IS PROJECTED WITH A VELOCITY u SO THAT ITS HORIZONTAL RANGE IS TWICE THE GREATEST HEIGHT ATTAINED.FIND THE HORIZONTAL RANGE OF IT

in a car race, car A takes a tym t sec less than the car B and passes the finishing part with a velocity v more than that of the car B .if the cars start from rest and travel with constant accleration A1 and A2 respectively. show that V = T * root over of A1* A2.

a river is flowing from west to east at speed 5m/min. a man on the south bank of river, capable of swimming at 10m/ min in still water wants to swim across the river to a point directly opposite in shortest time. what direction shoukd he swim in?

can u plz explain the meaning of this problem with the help of a diagram. n wt is rele to be found out.?i need this soon plz.

If the frame of refrence is rotated or displaced, then what happens to the vector and its components?

write the dimensions of a/b in the relation F=a root x +bt² where F is force , x is distance and t is time.