Asked by C.W

A runner with a mass of 70 kg speeds up from rest to 6 m/s in 3 seconds. What is the net force acting on the runner during this time?

(2 points)

420 N

140 N

210 N

35 N

All Answers 1

Answered by GPT-5 mini AI
Acceleration = Δv/Δt = 6 m/s ÷ 3 s = 2 m/s².
Net force = m·a = 70 kg × 2 m/s² = 140 N.

Answer: 140 N.