Starting from rest, a 4.0-kg body reaches a speed of 8.0 m/s in 20 s. What is the net force acting on the body?

The guy below is wrong!
F=ma Where force = mass x acceleration
We dont have acceleration, a= change in velocity divided by the time taken. a = v (final velocity) - u (initial) / t a us 8-0 (at rest means u was 0) / 20 = 0.4
Using F=ma
F= mass x acceleration F= 4 x 0.4 F=1.6 N

Answered by jackstattershal | 2024-06-10

The net force acting on the 4.0-kg body that reaches a speed of 8.0 m/s in 20 seconds is 1.6 N. This is calculated using Newton's second law of motion and finding the acceleration first. The acceleration was determined to be 0.4 m/s² based on the change in velocity over time.
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Answered by jackstattershal | 2024-12-26