Question

A 63.0-kg sprinter starts a race with an acceleration of 4.20 m/s². What is the net external force on him?

The net external force on the sprinter is approximately:
a) 63.0 N
b) 132.6 N
c) 265.2 N
d) 529.2 N

Answer 1

The net external force on the sprinter is approximately 264.6 N.

Step-by-step explanation:

To calculate the net external force on the sprinter, we can use Newton's second law of motion which states that force equals mass times acceleration (F = ma). Since the acceleration and the mass of the sprinter are given, we can substitute those values into the equation to find the net external force.

Given:

• Mass (m) = 63.0 kg
• Acceleration (a) = 4.20 m/s²

Using the formula F = ma, we can calculate:

F = (63.0 kg)(4.20 m/s²) = 264.6 N

Therefore, the net external force on the sprinter is approximately 264.6 N.