Read the questions carefully. Choose and encircle the correct answer.
1. A pulley is
A. A bar used to lift heavy loads C. Made of two inclined planes
B. A wheel with a groove
for a rope
D. A lever with an arm and a fulcrum
2. Which simple machine is used in a variety of ways to lift loads, apply forces, and to transmit power?
A Lever
B. Pulley
C. Wedge D. Screw
1. A pulley is
A. A bar used to lift heavy loads C. Made of two inclined planes
B. A wheel with a groove
for a rope
D. A lever with an arm and a fulcrum
2. Which simple machine is used in a variety of ways to lift loads, apply forces, and to transmit power?
A Lever
B. Pulley
C. Wedge D. Screw
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Answer:
1. B. A wheel with a groove for a rope
A pulley is simply a wheel with a groove in it, and a rope in the groove. It is also called a drum or a sheave.
2. B. Pulley
Pulleys are used in a variety of ways to lift loads, apply forces, and to transmit power, but the simplest of pulleys serves only to reverse the direction of the effort force.
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Answer:
1 A or B
2 A or B
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