A drunkard is waking along a straight road. He takes 5 steps forward and 3 steps backward and so on. each step is 1 m long and takes 1s. There is a pit on the road 11 m away from the starting point. The drunkard will fall into the pit after
A person moves 30 m north and then 30 m towards east and finally 30 m in south-west direction. The displacement of the person from the origin will be
If a particle travels n equal distance with speeds v1, v2,......... vn, then the average speed fo the particle will be
The deceleration experienced by a moving motor boat, after its engine is cut-off is given by dv/dt = – k v3, where k is constant. If v0 is the magnitude of the velocity at cut-off, the magnitude of the velocity at a time t after the cut-off is
For motion of an object along x-axis, the velocity v depends on the displacement x as v = 3x2 – 2x. What is the acceleration at x = 2m.
A particle moves from A to B. The ratio of distance to displacement is
Person is going 40 m, north, then 30 m east and then 30 m southwest. The net displacement will be
A particle is moving along the path y = 4x2. The distance and displacement from x = 1 to x = 2 is (nearly)
A particle moves according to the equation x = t2 + 3t + 4. The average velocity in the first 5 s is
A body throws a ball to his friend 20 m away. The ball reaches to the friend in 4s. The friend then throws the ball back to boy and it reaches the boy in 5s. assume the ball travels with constant velocity during any throw.