NSC / Matric Work, Energy and Power — practice questions
7 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice NSC / Matric Work, Energy and Power in the app →In physics, when is work done on an object by a force?A force acts at right angles to the direction in which an object is moving. How much work does that force do?A competitor carries two very heavy sleds across level ground at a steady height. How much work does he do on The net force on an object does work on that object. What must change as a result?What is the defining feature of a conservative force?A 1200 kg car travelling at 20 m/s brakes to a stop. The brakes provide a constant frictional force of 6000 N A hoist lifts a 500 kg load through 12 m at constant speed in 20 s. Taking the gravitational acceleration as 9