Motion in A Str...

A ball dropped from a height of $$10$$ m, rebounds to a height of $$2.5$$ m. If the ball is in contact with the floor for $$0.01$$ second, its acceleration during contact is ($$g = 9.8$$ $$ms^{-2}$$)

A car moving with a constant acceleration covers the distance between two points $$180\;m $$ apart in $$6\;s$$. If its speed as it passes the second point is $$45\;ms^{-1}$$, its speed at the first point is

A sharp stone of mass $$2$$ kg falls from a height of $$10$$ m on sand and buries into the sand. It comes to rest in a time of $$0.029$$ second. The depth through which it buries into sand is

A bus is moving along a straight road with a uniform acceleration. It passes through two points A and B separated by a certain distance with velocity of $$30$$ kmph and $$40$$ kmph respectively.Velocity of the car exactly midway between A and B is

A body travels $$200\;cm$$ in the first two seconds with cosntant speed and $$220\;cm$$ in the next $$4$$ seconds with constant deceleration. The speed of the body at the end of the $$7^{th}$$ second is

While moving with uniform acceleration, a body has covered $$550 \;m$$ in $$10$$ second and attained a velocity of $$105 \;ms^{-1}$$. Its initial velocity $$u$$ and acceleration $$a$$ respectively are

The average velocity of a body moving with uniform acceleration after travelling a distance of $$3.06\ m$$ is $$0.34\ {m/s}$$. The change in velocity of the body is $$0.18\ {m/s}$$. During this time, its acceleration is

A body travels $$200\;m$$ in the first two second and $$220\;m$$ in the next four second. The velocity at the end of the seventh second from the start will be

A ball after having fallen from rest under the influence of gravity for $$6s$$, crashes through a horizontal glass plate, thereby losing two-third of its velocity. Then it reaches the ground in $$2s$$, height of the plate above the ground is

A ball is thrown straight upward with a speed $$v$$ from a point $$h$$ meters above the ground. The time taken for the ball to strike the ground is