A boy drops a coin form the top of a building with is 49m high. Find the velocity with which the coin strikes. Calculate total time (t) it takes to return to the surface of earth .

A ball is thrown vertically upwards with a velocity of 49 m//s . Calulate (i) The maximum height to which it rises, (ii) the total time it takes to return to the surface of the earth.

A man drops a 20 kg object from the top of a 10m high building . What will be the velocity of the object when it just hits the ground?

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.

Two buildings are facing each other on either side of a road of width 12m. Form the top of the first building , which is 10m. High, the angle of elevation of the top of the second is 60^@ . What is the height of the second building?

Name the type of waves which are used for line of sight (LOS) communication. What is the range of their frequencies? A transmitting antenna at the top of a tower has a height of 20m and the height of the receiving antenna is 45m. Calculate the maximum distance between them for satisfactory communication in LOS mode. (Radius of the Earth = 6.4 xx 10^(6) m)

A radar has a power of 10 kW and is operating at a frequency of 20 GHz. If islocated on the top of a hill of height 500m.Calculate the maximum distance upto which it can detect object located on the surface of the earth ? R = 6.4 xx 10^6 m.

A radar has a power of 1 kW and is operating at a frequency of 10 GHz it is located on a mountain top of height 500 m The maximum distance upto which it can detect object located on the surface of the earth (Radius of earth = 6.4 xx 10^(6) m ) is

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.