ANSWER: The drive pulley always turns. Slower than pulleys A, B, and C.
What would you tell the individual attempting to loosen the rusty nut with the
wrench? - ANSWER Move your hand away from the nut.
An automobile comes to a quick stop. Why are the passengers propelled
forward, against their seat belts? - ANSWER The inertia of every traveler
In this pulley system, what force must be supplied to balance the 10-pound
weight?
True, frictional forces - ANSWER: Always fight forces that produce motion.
Centrifugal force is the - answer Outward force produced by rotation
Which wheels or gears move in the same direction as A? - Answer E only.
Four weights are connected together and suspended from the ceiling. What will
be the cord's tension at the point labelled x? - ANSWER: 60 pounds
The picture depicts a water tank constructed of wood planks with reinforced
metal hoops. Why are the hoops closer together at the bottom of the tank? -
ANSWER The water pressure pushing against the sides of the tank is higher
near the bottom.
The surface area of piston A is 2 square inches, and that of piston B is 4 square
inches. If piston A is pushed 6 inches down, how far will piston B go up? -
ANSWER 12.
The piston is attached to a wheel by a pin in the groove. If the wheel revolves
around a fixed axis, the piston will - Move back and forth.
If gear A turns at 2 rpm, how fast will gear B turn? - ANSWER 4 rpm.
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