Question

a student pushes a 0.500 kg trolley along a frictionless surface and accelerates it from rest to 4m/s. how much kinetic energy does the trolly gain?​

Answer 1

• mass=m=0.5kg
• velocity=4m/s

`\\ \sf\longmapsto KE=(1)/(2)mv^2`

`\\ \sf\longmapsto KE=(1)/(2)(0.5)(4)^2`

`\\ \sf\longmapsto KE=0.25(16)`

`\\ \sf\longmapsto KE=4J`