A block is sliding down on an inclined plane. The velocity changes at a constan

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A block is sliding down on an inclined plane. The velocity changes at a constant rate from

10 c m s^{- 1}

to

15 c m s^{- 1}

in

2

seconds. What is its acceleration?

Options:

A . 2.5 cms−2

B . 1.5 cms−2

C . 4.5 cms−2

D . 1.25 cms−2

Answer: Option A
:
A
The motion is depicted below

A block Is Sliding Down On An Inclined Plane. The Velocity ...

Let

u

be the initial velocity,

v

be the final velocity and

t

be the time taken.

v = 15 c m s^{- 1}, u = 10 c m s^{- 1}, t = 2 s

We know thatacceleration,

a

is given by:

a = \frac{v - u}{t}

a = \frac{15 - 10}{2}

c m s^{- 2}

a = 2.5 c m s^{- 2}

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