
Efficiency of Simple Machines Quiz
Authored by AVELINO II KAKILGAN
Science
12th Grade
NGSS covered
Used 7+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Which combination of simple machines is found in a pair of scissors?
Lever and wedge
Pulley and inclined plane
Wheel and axle and screw
Wedge and inclined plane
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Which simple machine is most efficient for lifting heavy objects vertically?
Inclined plane
Pulley system
Lever
Wheel and axle
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Which principle best explains how a lever reduces the effort needed to lift a heavy object?
Mechanical advantage
Friction reduction
Energy conservation
Rotational motion
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What happens to the efficiency of a machine if friction increases?
Efficiency increases
Efficiency decreases
Efficiency remains constant
Efficiency becomes unpredictable
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
How does increasing the length of an inclined plane affect its efficiency?
It decreases efficiency by increasing friction.
It increases efficiency by reducing the force needed.
It has no effect on efficiency.
It increases efficiency by reducing energy loss.
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Which factor has the greatest impact on the efficiency of a pulley system?
The weight of the object being lifted
The number of pulleys used
The length of the rope
The material of the rope
Tags
NGSS.MS-PS2-1
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Why is lubrication important in improving the efficiency of machines?
It increases mechanical advantage.
It reduces energy loss due to friction.
It eliminates the need for input work.
It increases the speed of motion.
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