Question

How much horizontal force f must a sprinter of mass 47 kg exert on the starting blocks to produce this acceleration? express your answer in newtons using two significant figures?

Answer 1

This statement is missing the first sentence which states the horizontal acceleration.

I found that the desired horizontal acceleration is 15.0 m/s^2.

Now, you must use second law of Newton to calculate the force.

Second Law of Newton: F = m * a

=> F = 47 kg * 15 m/s^2 = 705 N

Answer: 705 N