D: R→Q→P
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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…
A javelin has a mass of 0.80 kg. The javelin is released with 250 J of kinetic energy. What is the speed of the javelin?
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…
Four rocks on different planets have masses and weights as shown. Which planet has the greatest gravitational field s…