It takes a car 10 seconds to increase its speed from 60 k/hr to 90 k/hr. What is the rate of acceleration (slope) in k/hr/sec?
A) 6
B) 9
C) 3
D) 1/6
E) 1/9

Question

Quizplus · Accepted Answer

Acceleration is defined as the rate of change of velocity with respect to time. In this case, the velocity changes from 60 k/hr to 90 k/hr in 10 seconds. Therefore, the rate of acceleration can be calculated as:

Acceleration = (Final Velocity - Initial Velocity) / Time

Acceleration = (90 k/hr - 60 k/hr) / 10 sec

Acceleration = 3 k/hr/sec

Therefore, the correct choice is C.

It Takes a Car 10 Seconds to Increase Its Speed