Question

A helicopter’s speed increases from 30 m/s to 40 m/s in 5 seconds. What is the acceleration of this helicopter? m/s2

Answer 1

Answer:

2m/s2

Explanation:

Answer 2

Answer:

The acceleration of this helicopter is $2 m/s2$

Explanation:

In this question the velocity changes from 30 m/sto 40 m/s in 5 seconds.

Initial velocity u= $30m/s$

Final velocity u= $40m/s$

Time t= $5s$

Acceleration is defined as the rate of change of velocity. It is given by the equation

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

      =$\frac{40-30}{5}$

= $\frac{10}{5}$  

= $2 m/s2$

All moving bodies aren’t necessarily accelerated. To be identified as accelerating, a body should have its velocity changing. Thus a body in uniform motion is not accelerating since its velocity is constant.