Question: A crate slides down a ramp that makes a (20^{circ}) angle with the ground. To keep the crate from sliding too fast, Paige pushes back

A crate slides down a ramp that makes a $20^{\circ}$ angle with the ground. To keep the crate from sliding too fast, Paige pushes back on it with a $68 \mathrm{~N}$ horizontal force. How much work does Paige do on the crate as it slides $3.5 \mathrm{~m}$ down the ramp?

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