Question

A block of mass 3 kg is accelerated from rest to 30 m/s in 2 s. The average force on the block is​

Answer 1

Answer:

Given :

Mass of the block m = 3 kg

Initial velocity u = 0

Final velocity v = 30 m/s

Time interval t = 2 seconds

To find out :

The average force on the block

Solution:

If the acceleration of the block is a then

Using the first equation of motion

v=u+at

Or, 30 =0+a×2

Or, a = 15 m/s^2

Therefore, the force acting on the block

F = ma

= 3×15

= 45 N

Answer 2

Answer:45 newton

Explanation:

View the picture given above