3. A block weighing 10 Newtons is dropped from a height h = 12 cm above a (correctly calibrated) spring balance with k = 1000 N/m. What maximum
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3. A block weighing 10 Newtons is dropped from a height h = 12 cm above a (correctly
calibrated) spring balance with k = 1000 N/m. What maximum weight will the balance
read momentarily?
B
h
4. Two blocks (my = 1 kg, mg = 2 kg) are attached by a light cord as depicted in
the figure. The hanging block is released from rest and falls to the ground from a height
h = 0.50 m. The block on the table consequently slides a total distance d = 0.80 m.
Determine the coefficient of kinetic friction between table and block.
5. A uniform chain of length 8.00 m initially lies stretched out on a horizontal table. (a)
If the coefficient of static friction between the chain and table is 0.600, show that the chain
will begin to slide off the table if at least 3.00 m of it hangs over the edge of the table. (b)
Determine the speed of the chain as all of it leaves the table, given that the coefficient of
kinetic friction between the chain and table is 0.400. Hint: Use energy methods and locate
the hanging portion of the chain by its center.

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