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

$\\ \sf\longmapsto KE=\dfrac{1}{2}mv^2$

$\\ \sf\longmapsto KE=\dfrac{1}{2}(0.5)(4)^2$

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

$\\ \sf\longmapsto KE=4J$