State whether the following statement is true or false:
The rate of doing work is called power.

$A$ light and a heavy object have the same momentum. Find out the ratio of their kinetic energies. Which one has a larger kinetic energy?

$(a)$ Define one watt.
$(b)$ $A$ lamp consumes $1000 \ J$ of electrical energy in $10 \ s$. What is its power?

State whether the following statement is true or false:
In order to get minimum work,the angle between force and displacement should be $90^{\circ}$.

$A$ body is falling from a height $h$. After it has fallen a height $\frac{h}{2}$,it will possess

State whether the following statement is true or false:
When an arrow is released from a bow,potential energy changes into kinetic energy.