Question

a ball rolling in a straight line and slow down from 8ms- to 2ms- what is its asseleration?

Answer 1

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Answer:0.6ms-2

Explanation:initial velocity u=8ms-1

Final velocity v=2ms-1

Time taken ▲t=10 s

Since the acceleration is assumed to be uniform

a=v-u/▲t= (2-8)/10=6/10=0.6ms-2

The deceleration is

0.6 ms-2

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Answer 2

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The velocity of a golf ball rolling in a straight line changes from 8m/s to 2m/s in 10s. What is the deceleration assuming that it is decelerating uniformly?

$huge\fcolorbox{black}{lime}{AnsweR:}$

Initial velocity u=8ms-1

Final velocity v=2ms-1

Time taken ▲t=10 s

Since the acceleration is assumed to be uniform

a=v-u/▲t= (2-8)/10=6/10=0.6ms-2

The deceleration is

0.6 ms-2.

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