Solve the following examples / numerical problems:
A stone is dropped from rest from the top of a building 44.1 m high. It takes 3 s to reach the ground . Use this information to calculate g.

Solve the following examples / numerical problems: A body is released from the top of a building of height 19.6 m . Find the velocity with which the body hits the ground.

Solve the following examples / numerical problems: A metal ball of mass 5 kg falls from a height of 490 m. How much time will it take to reach the ground ?

Solve the following examples / numerical problems: A stone on a bridge on a river falls into the river. If it takes 3 seconds to reach the surface of water, find (i) the velocity of the stone at the instant it touches the surface of water (ii) the height of the bridge from the surface of water.

Solve the following examples/ numerical problems: An object is placed at 10 cm from a convex lens of focal length 12 cm . Find the nature and position of the image .

Solve the following examples / numerical problems: An object takes 5 s to reach the ground from a height of 5 m on a planet . What is the value of g on the planet ?

Solve the following examples: (numerical problems) A person travels a distance of 72 km in 4 hours. Calculate the average speed in m/s .

Solve the following examples / numerical problems: An iron ball of mass 3 kg is released from a height of 125 m and falls freely to the ground. Assuming that the value of g is 10 m/s^2, calculate (a) the time taken by the ball to reach the ground (b) the velocity of the ball on reaching the ground.

Solve the following examples: (numerical problems) A body of mass 10 kg moves with a velocity of 5 m/s. Find its momentum.

Solve the following examples: (numerical problems) A person swims 100 m in the first 40 s, 80 m in the next 40 s and 45 m in the last 20 s. What is the average speed?