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

The answer is

3 m/s

Step-by-step explanation:

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

`v = \sqrt{ (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{ (2(31500))/(7000) } \\ = \sqrt{ (63000)/(7000) } \\ = \sqrt{ (63)/(7) } \\ = √(9) \: \: \: \\ = 3 \: \: \: \: \: \: \:`

We have the final answer as

3 m/s

Hope this helps you