Two masses one n times heavier than the other are dropped from same height. How do their momentum compare just before they hit the ground.

A balloon ascending at the rate of 9.8 ms^(-1) is at a height of 39.2 m above the ground when a packet is dropped from the baloon. After how much time and with what velocity does it reach the ground? g= 9.8 ms^(-2) .

A trolley of mass 200 kg moves with a uniform speed of 36 km/ h on a frictionless track. A child of mass 20 kg runs on the trolley from one end to the other (10 m away) with a speed of 4 m s^-1 relative to the trolley in a direction opposite to the its motion, and jumps out of the trolley. What is the final speed of the trolley? How much has the trolley moved from the time the child begins to run?

A body is allowed to fall from a height of 20 metres from the ground. How much time will take to reach the ground? What will be its velocity just a moment before hitting the ground?

Explain why a body dropped from rest and another projected horizontally from the same height strike the ground at the same time.

The masses of two bodies are same. One is placed at the height of 10 m and the other is placed at the height of 20 m. Which one has more potential energy?

There are two poles on each on either bank of a river just opposite to each other.One pole is 60m high.From the top of this pole the angles of depression of the top and the foot of the other pole are 30° and 60° respectively. Find the width of the river and the height of the other pole.

A ball is projected horizontally from certain height. At the same time another ball is dropped? Which of the two will land on the ground first? Why?

Work Problem related to speed, distance and time Two places A and B are at distance 160km . Two cars starting form tha same place and moving in the same direction meet after eight hours. Again moving in the oppoosite directions from A to B. The cars meet each other after one hour. Find the speed of the cars.

From the top of a tower 100m in height, a ball is dropped and at the same time another ball is projected vertically upwards from the ground with a velocity of 25ms^-1 . Find when and where two balls will meet.