Question

If a ball has a mass of 5 kg and 100 J of KE, what is its velocity?

Answer 1

6.2m/s

Step-by-step explanation:

Answer 2

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• Mass of ball=m=5kg
• Kinetic energy=KE=100J
• Velocity=v=?

We know

`\boxed{\sf K.E=(1)/(2)mv^2}`

`\\ \sf\longmapsto 100J=(1)/(2)5* v^2`

`\\ \sf\longmapsto v^2=100* (2)/(5)`

`\\ \sf\longmapsto v^2=20(2)`

`\\ \sf\longmapsto v^2=40`

`\\ \sf\longmapsto v=√(40)`

`\\ \sf\longmapsto v=6.2m/s`