A 1 000-N crate is being pushed across a level floor at a constant speed by a force F of 300 N at an angle of 20.0° below the horizontal, as shown in Figure P4.4la. (a) What is the coefficient of kinetic friction between the crate and the floor? (b) If the 300-N force is instead pulling the block at an angle of 20.0° above the horizontal, as shown in Figure P4.41lb, what will be the acceleration of the crate? Assume that the coefficient of friction is the same as that found in part (a). 20.0° 20.0

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A1 000-N crate is being pushed across a level floor at
a constant speed by a force F of 300 N at an angle of
20.0° below the horizontal, as shown in Figure P4.4la.
(a) What is the coefficient of kinetic friction between
the crate and the floor? (b) If the 300-N force is
instead pulling the block at an angle of 20.0° above the
horizontal, as shown in Figure P4.41b, what will be the
acceleration of the crate? Assume that the coefficient
of friction is the same as that found in part (a).
20.0°
20.0°
Figure P4.41
Transcribed Image Text:A1 000-N crate is being pushed across a level floor at a constant speed by a force F of 300 N at an angle of 20.0° below the horizontal, as shown in Figure P4.4la. (a) What is the coefficient of kinetic friction between the crate and the floor? (b) If the 300-N force is instead pulling the block at an angle of 20.0° above the horizontal, as shown in Figure P4.41b, what will be the acceleration of the crate? Assume that the coefficient of friction is the same as that found in part (a). 20.0° 20.0° Figure P4.41
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