TOTAL 3 qns:
A child slides across a floor in a pair of rubber-soled shoes. The friction force acting on each foot is 22 N, the footprint area of each foot is 16 cm2, and the thickness of the soles is 5.0 mm. Find the horizontal distance traveled by the sheared face of the sole. The shear modulus of the rubber is 3.0 106 Pa.
Another qn:
9.16 A 10.0 kg block of metal is suspended from a scale and immersed in water as in Figure P9.30. The dimensions of the block are 12.0 cm 10.5 cm 10.5 cm. The 12.0 cm dimension is vertical, and the top of the block is 5.00 cm below the surface of the water
a) What are the forces exerted by the water on the top and bottom of the block? (Do not ignore the effect of the air above the water. Take P0 = 1.0130 105 N/m2.) Ftop N
Fbottom N
(b) What is the reading of the spring scale?
N
(c) Show that the buoyant force equals the difference between the forces at the top and bottom of the block.
2006-10-23
20:50:53
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1 answers
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asked by
Anonymous
in
Physics