My 10 lb cat wants to push his box of kitty chow off the table so it will spill a snack for his afternoon "tea". The box has a mass of 1 kg (that's 2.2 lb of gravitational downward force) and the coefficient of friction with the table top is 0.7. How much force does he have to push with to get the box to begin to slide? 7 N 10 N 10 lb 2.2 lb
answers to both question s
My 10 lb cat wants to push his box of kitty chow off the table so it will spill a snack for his afternoon "tea". The box has a mass of 1 kg (that's 2.2 lb of gravitational downward force) and the coefficient of friction with the table top is 0.7. How much force does he have to push with to get the box to begin to slide?
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7 N |
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10 N |
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10 lb |
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2.2 lb |
A box rests without slipping on a tilted table. What forces act on it to keep it stationary?
Pick the answers that are correct.
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A downward gravitational force, mg. |
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The sum of all forces, which is zero. |
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A frictional force between the block and the table that is always the same, no matter the angle of the table or the mass of the block. |
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A force perpendicular to the table, the normal force mg cos(θ), where θ is the angle of the tilt of the table's surface to the horizontal. |
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A frictional force parallel to the table up to a maximum set by the coefficient of friction, the mass of the block, and the tilt of the table. |
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