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The particle accelerated at a constat ra...

The particle accelerated at a constat rate from 23 mi./hr. to 58 mi./hr. In 3.5 sec. Its acceleration was

A

10 mi./hr. per sec.

B

58 mi./hr. per sec.

C

23 mi./hr. per sec.

D

less than 10 mi./hr. per sec.

Text Solution

Verified by Experts

The correct Answer is:
A
`a=(v_2-v_1)/t`
`=(58 mi//hr-23 mi//hr )/(3.5 sec)="3.5 mi/hr"/"3.5 sec"`
=10 mi./hr per sec
Or since 35 mi/hr = 51 ft/sec
`a="51 ft/sec"/"3.5 sec"`
=12.7 ft. per `sec^2`
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