Question

Something has a mass of 40 kg and a velocity of 1 m/s

How much kinetic energy does it have?

Part 2: If it doubles its mass, will its KE also double?

Answer 1

• m=40kg
• v=1m/s

`\\ \sf\Rrightarrow K.E=(1)/(2)mv^2`

`\\ \sf\Rrightarrow K.E=(1)/(2)(40)(1)^2`

`\\ \sf\Rrightarrow K.E=20J`

Part 2:-

• m=80kg

`\\ \sf\Rrightarrow K.E=(1)/(2)(80)(1)^2`

`\\ \sf\Rrightarrow K.E=40J`

• Yes