Answer:60 gm
Explanation:
Given
initial velocity of ball 
Force exerted by racquet 
time period of force 
final velocity of ball 
Racquet imparts an impulse to the ball which is given by



All it does is lets him pull in a more convenient direction to raise the load. It has no effect on the required force.
radiation
when the suns radiation fall on the earth and its objects they receive heat energy and hence get heated. Thus the suns heat reaches the earth by. the process of radiation
Answer:
The acceleration of the object is -69.78 m/s²
Explanation:
Given;
postion of the particle:

The velocity of the particle is calculated as the change in the position of the particle with time;

Acceleration is the change in velocity with time;
