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A 9.5 kg box sits on a ramp. If the normal force on the box from the ramp is 91.59 N, what is the angle the ramp makes with the (horizontal) ground?

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A 8.6 kg box sits on a ramp. If the normal force on the box from the ramp is 74.68 N, what is the angle the ramp makes with the (horizontal) ground?

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A 6.8 kg box sits on a ramp. If the normal force on the box from the ramp is 56.26 N, what is the angle the ramp makes with the (horizontal) ground?

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A 9.7 kg box sits on a ramp. If the normal force on the box from the ramp is 90.04 N, what is the angle the ramp makes with the (horizontal) ground?

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A 7.3 kg box sits on a ramp. If the normal force on the box from the ramp is 67 N, what is the angle the ramp makes with the (horizontal) ground?

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A 4.5 kg box sits on a ramp. If the normal force on the box from the ramp is 38.26 N, what is the angle the ramp makes with the (horizontal) ground?

^o