(a)[1]
Find the crate’s constant speed.
(b)[2]
Find the work done by the $25\text{ N}$ force.
(c)[1]
Find the power at which the $25\text{ N}$ force is working.
Mathematics 9709 · AS & A Level · Energy, work and power
Energy, work and power — practice question
A crate is pushed in a straight line across a horizontal surface by a force of magnitude $25\text{ N}$ acting at $20^\circ$ above the horizontal. Over $8$ seconds, the crate travels $12\text{ m}$ at constant speed.
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This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The speed is $1.5\text{ m s}^{-1}$ (or OE such as $\frac{3}{2},\frac{12}{8}$)” …
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