1.student who owns a Venom Hennessey GT records the acceleration of his car to be 11.2 m/s2 from rest to 26.8 m/s (60 mph). (a) How long does this take? (b) How far does the car get? 2. man on a cliff falls from a height of 20 feet. (a) With what velocity does he hit the ground? (b) If he were able to break his fall at 5 feet, with what velocity does he hit fall at 5 feet?

Question
Asked Oct 14, 2019

1.student who owns a Venom Hennessey GT records the acceleration of his car to be 11.2 m/s2
from rest to 26.8 m/s (60 mph). (a) How long does this take? (b) How far does the car get?

 

2. man on a cliff falls from a height of 20 feet. (a) With what velocity does he hit the ground? (b) If
he were able to break his fall at 5 feet, with what velocity does he hit fall at 5 feet? 

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Expert Answer

Step 1

(1)

According to the kinematics equation, find the time taken for his record.

Substitute the values, to find time period.

=u+at
a
26.8m/s-0m/s
11.2m/s
=239s
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Image Transcriptionclose

=u+at a 26.8m/s-0m/s 11.2m/s =239s

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Step 2

According to the kinematics equation, find the distance of the ...

2a
(26.8m/s)-(om/s)
2(11.2m/s)
= 32.0m
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2a (26.8m/s)-(om/s) 2(11.2m/s) = 32.0m

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