An athlete runs some distance before taking a long jump,because

$A$ body of mass $500 \, g$ is at rest on a frictionless surface. Calculate the distance travelled by it in $10 \, s$ when acted upon by a force of $10^{-2} \, N$. (in $, m$)

$(a)$ State Newton's second law of motion. Use this law to find a method to measure force acting on an object.
$(b)$ From a rifle of mass $4 \ kg$,a bullet of mass $50 \ g$ is fired horizontally with an initial velocity of $40 \ m \ s^{-1}$. Calculate the initial recoil velocity of the rifle.

Newton's second law of motion gives us a measure of

Give two examples in each case,of a force that:
$(i)$ lifts
$(ii)$ pushes
$(iii)$ pulls
$(iv)$ stretches
$(v)$ compresses
$(vi)$ resists
$(vii)$ attracts
$(viii)$ squeezes

When balanced forces act on a body,the body is