C: power
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The diagram shows a girl lifting a box of weight 50 N from a low shelf to a high shelf. How much work is done on the …
The diagram shows the energy transfer through a machine. The machine is 50% efficient. Which equation is correct?
A crane lifts a load of 6000N through a vertical distance of 15m in 30 s. What is the average useful power during thi…
An object falls from rest through the air. Its velocity increases until it reaches terminal velocity. Which quantity …
The diagram shows a block of stone on a rough horizontal surface. Force P acts on the block as shown. The block is at…
The distance travelled by a car is increasing uniformly as it is driven along a straight road up a hill. Which quanti…