Question

A delivery van has a mass of 7000 kg and a kinetic energy of 31,500 J. what is it’s speed

Answer 1

Answer:

The answer is

3 m/s

Explanation:

The speed of an object given it's kinetic energy and mass can be found by using the formula

$v = \sqrt{ \frac{2KE}{m} }$

where

KE is the kinetic energy

m is the mass

v is the speed

From the question

KE = 31,500 J

m = 7000 kg

The speed is

$v = \sqrt{ \frac{2(31500)}{7000} } \\ = \sqrt{ \frac{63000}{7000} } \\ = \sqrt{ \frac{63}{7} } \\ = \sqrt{9} \: \: \: \\ = 3 \: \: \: \: \: \: \:$

We have the final answer as

3 m/s

Hope this helps you