Question

A particle is moving up an inclined plane. Its velocity changes from 15m/s to 10m/s in two seconds. What is its acceleration?​

Answer 1

Answer:

2.5 m/s^2

Explanation:

The acceleration of a body is defined as the rate of change of velocity.

Now here we have two instants mentioned, so we cannot find the instantaneous acceleration. But we can find the average acceleration.

$a_{avg} = \frac{\Delta v}{\Delta t} = \frac{v_f - v_i}{\Delta t} = \frac{15-10}{2} = 2.5 ms^{-2}$

Now if the acceleration is known to be uniform, then this will be the instantaneous acceleration.

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Answer 2

Answer:

Explanation:

Initial velocity of object (u) = 15m/s

Final velocity of object (v) = 10 m/s

Time taken (t) = 2 seconds

As, we know formula for acceleration is -

(v-u)/t

So, Acceleration = (10-15)/2

= -5/2

= -2.5 m/s²

Answer) Acceleration of body is -2.5 m/s²