A car and a truck are traveling in the same direction along a straight section of highway. The car is moving at 55. mph and the truck is moving 45. mph. What is the velocity of the truck relative to the car?
What will be an ideal response?
10. mph backward
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A parallel plate of area 400 cm2 is dragged over a 0.20 cm thick layer of oil at a speed of 30.0 cm/s. It takes a force 1.20 N applied to the plate to sustain this speed. What is the viscosity of the oil?
A) 6.00 kg/(m?s) B) 20.0 kg/(m?s) C) 60.0 kg/(m?s) D) 0.200 kg/(m?s) E) 200 kg/(m?s)
A 400-N crate rests on a ramp; the maximum angle just before it slips is 15.0° with the horizontal. What is the coefficient of static friction between crate and ramp surfaces?
a. 3.7 b. 0.47 c. 2.1 d. 0.27 e. 0.40
For lunar tides to occur in the human body
A) most of the body would have to be in the liquid state. B) Earth's gravitation would have to be incredibly small. C) parts of the body would have to be appreciably closer to the Moon than other parts. D) none of the above
Mars has larger volcanoes than Earth's Hawaii
Indicate whether the statement is true or false