A gasoline engine receives 250 J of energy from combustion and loses 200 J as heat energy to the exhaust. What is its efficiency?
A man exerts a force of 250 N along the inclined plane to load 1000 N crate into a truck. What is the mechanical advantage of the inclined plane?
A car experiences a centripetal acceleration of 9 m/s2 when it negotiates a curved level road of radius 4 m. What is its tangential velocity?
Ball A moving along a straight line at 2 m/s collides elastically with ball B of same mass moving at -3 m/s. What is the velocity of the balls A and B after collision?