A trolley while going down an inclined plane

Asked by admin @ 24/08/2021 in Physics viewed by 268 People

A trolley, while going down an inclined plane, has an acceleration of 2 cm s-2. What will be its velocity 3 s after the start?

NCERT Class IX
Sciences - Main Course Book
Chapter 8. Motion

Answered by admin @ 24/08/2021

Answer:

Explanation:

Given :-

Acceleration of trolley, a = 2 cm/s² = 0.02 m/s²

Initial speed of trolley, u = 0 (As trolley starts from rest)

Time taken by trolley, t = 3 seconds

To Find :-

Final speed, v = ??

Formula to be used :-

1st equation of motion,

i.e, v = u + at

Solution :-

Putting all the values, we get

v = u + at

⇒ v = 0 + 0.02 × 3

⇒ v = 0.02 × 3

⇒ v = 0.06 m/s

Hence, the final velocity of trolley is 0.06 m/s.

Important Term :-

Final speed - Final speed is that speed which is acquired by the body after its start. It is denoted by v. When a body finally comes to rest, its final speed is zero.

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