Question

How much force is needed to stop an 80-kg football player if he decelerates at 5 m/s2? 5 N 16 N 20 N 400 N

Answer 1

Force=M*A so then it’s the weight of the player times the acceleration which would equal 400N

Answer 2

The force needed is 400 Newtons.

Step-by-step explanation:

The force can be determined by means of Newton's law.

`F = m \cdot a` (1)

Where F is the force needed to stop the football player, m is the mass of the football player and a is the acceleration.

`F = (80 kg)\cdot (5m/s^(2))`

`F = 400 kg.m/s^(2)`

However, 1N = 1 kg.m/s^{2}

`F = 400 N`

Hence, the force needed is 400 Newtons.