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2 years ago

6

17. How long will it take for an object accelerating at a constant rate of 5 m/s to change its velocity from 0 to 6 m/s? (A) 0.6

s (B) 1.2 s (C) 2.4 s (D) 3.6 s (E) 4.8 s

1 answer:

VikaD [51]2 years ago

8 0

Answer:

(B)

Explanation:

Time = change of velocity ÷ acceleration

= (6-0) ÷ 5

= 1.2

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A truck on a straight road starts from rest and accelerates at 1.4 m/s 2 until it reaches a speed of 22 m/s. Then the truck trav

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Answer:

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Explanation:

In first part : The truck start from the rest that is u = 0 m/sec

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Now according to first law of motion $v=u+at$

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$t=15.71sec$

In second part : The truck maintain a constant speed for 22 sec

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So total time in which the truck is in motion =15.71+22+4.4=42.11 sec

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