Question

A runner takes approximately 2 seconds to reach a velocity of 10 m/s from the rest. Calculate its acceleration.

Answer 1

Answer:

Acceleration of runner = 5 m/s²

Explanation:

Given:

• Time = t = 2 seconds
• Initial velocity = u = 0
• Final velocity = v = 10 m/s

To find:

• Acceleration = ?

Solution:

Acceleration of an object is the change in velocity with respect to time.

It can be given by the formula:

a = (v - u) ÷ t

⇒ a = (10 - 0) ÷ 2

⇒ a = 10 ÷ 2

⇒ a = 5 m/s²

∴ Acceleration = 5 m/s²

KNOW MORE:

• This question can also be solved by using the third law of motion which says that v = u + at.