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A trolley while going down an inclined plane has an acceleration of $2 cm / s²$ . What will be its velocity $3 s$ after the start___ $cm / s$ ?

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5

6

3

2

answer is B.

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Detailed Solution

A trolley, while going down an inclined plane, has an acceleration of

2 cm / s²

. Its velocity

3 s

after the start would be

6 cm / s

.
Given:

u = 0, a = 2 cm / s², t = 3 s

Formula:

v = u + at

Putting all the values, we get
⇒

v = 0 + (2 \times 3)

⇒

v = 6 cm / s

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