question archive The coefficient of static friction between a trash can and the ground is 0
The coefficient of static friction between a trash can and the ground is 0
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The coefficient of static friction between a trash can and the ground is 0.40 and the µk=0.20. The can itself weighs 2.5kg. On garbage collection day, the can weighs 44 lbs. Without wheels on the bottom of the can, how much horizontal force is needed to move the can? [Friction]
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44 lbs = 19.95 Kg
hence total mass will be = 19.95 + 2.5 = 22.45 Kg
Force required to start motion
F = ?μs?mg? = 0.4 x 22.45 x 9.81 = 88.29 N
Once motion starts than friction force will decrease and to keep it moving at constant speed amount of force required will be
F = ?μk?mg? = 0.2 x 22.45 x 9.81 = 44 N
