An elevator descends into a mine shaft at the rate of 5m/min. If the descent starts from 15m above the ground level, how long will it take to reach -250m.

A ball is dropped from a balloon going up at a speed of 7 m/s. If the balloon was at a height 60 m at the time of dropping the ball, how long will the ball take in reaching the ground?

A ramp for unloading a moving truck, has an angle of elevation of 30^(@) . If the top of the ramp is 0.9m above the ground level, then find the length of the ramp.

A monkey a mass 15 kg is climbing on a rope with one end fixed to the ceiling. If it whishes to go up with an acceleration of 1 m/s^2 , how much force should it apply to the rope? If the rope is 5 m long and the monkey starts from rest, how much time will it take to reach the ceiling?

A particle starts with an initial velocity 2.5 m/s along the positive x direction and it accelerates uniformly at the rate 0.50 m/s^2 . A. Find the distance travelled by it in the first two seconds. b.How much time does it take to reach the velocity 7.5 m/s ? c. How much distance will it cover in reaching the velocity 7.5 m/s?

A ladder is placed against a wall such that its foot is at a distance of 2.5 m from the wall and its top reaches a window 6 m above the ground. Find the length of the ladder.

AB is a vertical pole with B at the ground level and A at the top . A man finds that the angle of elevation of the point A from a certain point C on the ground is 60^@ . He moves away from the pole along the line BC to a point D such that CD = 7 m . from D the angle of elevation of the point A is 45 then the height of the pole is

An elephant and a matchbox fall from a height of 200m. If they are in state of free fall, which of them will reach the ground first and why?

a block is kept on the floor of an elevator at rest. The elevator starts descending with an acceleration of 12 m/s^2 . Find the displacement of the block during the first 0.2 s after the start. Take g=10 m/s^2 .