Question

When an object speeds up from 10 m/s to 70m/s in 3s, then its acceleration is


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Answer 1

Concept:

Acceleration is the rate of change of velocity with respect to time. It is a vector quantity. The SI unit of acceleration is metres/second^2 ( $m/s^{2}$).

Given:

we have,

Initial velocity(u) = 10 m/s, Final  velocity(v) = 70 m/s, Time (t) = 3s

Find:

We have to find the value of acceleration (a =?)

Solution:

To find the acceleration, the formula is given as

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

                                = $\frac{70-10}{3}$

                                 = $\frac{60}{3}$

                                 = $20 m/s^{2}$

Hence the value of acceleration when an object speeds up from 10 m/s to 70 m/s in 3 second is 20 m/s^2.

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