Energy

If the system is energy-isolated then :

• ΔU = ΔME

• ΔU = -ΔΜΕ

• ΔU = ΔE_total

Kinetic energy has the form of ...

• KE = 1/2 m.v

• KE = 1/2 m.v²

• KE = 1/2 m.v

The work done by air resistance force is ....

• Resistive

• Motive

• Zero

The work done by weight upon passing from A to B is.....

• mg(h_B - h_A)

• mg

• mg(h_A - h_B)

The height h is equal to

• h = d sinα

• h = (L - d) sinα

• h = - (L - d) sinα