Question

A cheetah can go from a state of resting to running at 20 m/s in just 2 seconds. What is the cheetah's average acceleration?

A.
10 m/s²

B.
40 m/s

C.
40 m/s²

D.
10 m/s

Answer 1

I think A

Answer 2

vf=at

a=vf/t

Answer 3

Hint:

This is a question based straight on the understanding of the definition of acceleration.

Definition of acceleration as per
http://www.physicsclassroom.com/class/1DKin/Lesson-1/Acceleration

"Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity."

If a car accelerates from 0 to 60 mph in 5 seconds, the average rate of change of velocity is 60 mph/5 s, or 12 mph/sec. (note that the unit is \(distance/time^2\).

Answer 4

Last one

Answer 5

a=20/2 m/s

Answer 6

what its D?

Answer 7

Thank you ^_^

Answer 8

Anytime.