Question

A car can move from rest to 35 m/s in 5.0 seconds. It's acceleration is

a. 7.0 m/s^2
b. 5.0 m/s^2
c. 4.0 m/s^2
d. 175 m/s^2

Answer 1

A) 7.0 m/s²

Step-by-step explanation:

Acceleration is found by using the formula:

• a = Δv/Δt

This means the change in time divided by the time interval will give us the car's acceleration.

Since the car starts from rest, its initial velocity is 0 m/s. Its final velocity is 35 m/s. The time interval for the car to go from 0 to 35 m/s is 5.0 seconds.

• a = (v - v₀)/t

Substitute the final and initial velocity into the formula.

• a = (35 - 0)/5
• a = 35/5
• a = 7

The acceleration of the car is A) 7.0 m/s².