Answered

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1.A skydiver accelerates from 20 m/s to 40 m/s in 2 seconds. What is the skydiver’s average acceleration?
2.A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration?
3.Calculate the acceleration of a car from rest that travels at 24 m/s due east in 30 s.
4.A truck’s speed increases from 12 m/s to 35 m/s in 30 s. It travels in only one direction. Find the acceleration

Sagot :

Bubokaidn

1

Given:

vf = 40m/s

vi = 20m/s

t = 2s

a = ?

a = vf - vi / t

a = 40-20 / 2

a = 20/2

a = 10m/s²

2

Given:

vf = 22m/s

vi = 4m/s

t = 3s

a = ?

a = vf - vi / t

a = 22-4 / 3

a = 18/3

a = 6m/s²

3

Given:

v = 24m/s

t = 30s

a = ?

a = v / t

a = 24 / 30

a = 0.8m/s² East

4

Given:

vf = 35m/s

vi = 12m/s

t = 30s

a = ?

a = vf - vi / t

a = 35 - 12 / 30

a = 23/30

a = 0.77m/s²

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