### Solution to problems – class 9 – Set 1 Q 22

##### June 4, 2019

## Problem Statement

**If a rocket-powered sled is accelerated to a speed of 400 m/s in 2 seconds, then what is the acceleration and what is the distance that the sled travels? **

## Solution

**Acceleration a = (v-u)/t = (400 – 0)/2 = 200 m/s ^{2} **

**Distance travelled by the sled S = ut + ½ a t**

^{2}A

**s u = 0, the equation becomes S = ½ a t**

^{2}

S = ½ .200. 2

S = ½ .200. 2

^{2}= 400 m