Ten seconds after starting from rest,a car is moving at 40 m/s.What is the car's acceleration in meters per second per second?
A)0)25
B)2)8
C)4)0
D)10
E)40

Question

Quizplus · Accepted Answer

We can use the formula for acceleration:

acceleration = (final velocity - initial velocity) / time

In this case, the initial velocity is 0 m/s and the final velocity is 40 m/s. The time is not given, so we cannot calculate the exact acceleration. However, we do know that the acceleration must be constant for the entire 10 seconds, since the car started from rest. Therefore, we can use the following formula:

acceleration = (change in velocity) / time

The change in velocity is 40 m/s - 0 m/s = 40 m/s. The time is 10 seconds. Therefore:

acceleration = 40 m/s / 10 s = 4 m/s^2

So the answer is C: 4.0.

Ten Seconds After Starting from Rest,a Car Is Moving at 40