4.1 Work and Machines
Quiz
•
Physics
•
9th Grade
•
Practice Problem
•
Medium
Aamir Ali
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10 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
The amount of work done depends on the
amount of force applied
mass and distance the object moves
mass and speed with which the object moves
amount of force and distance the object moves.
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
If no force is applied on a body its velocity remains the same but its kinetic energy keeps changing
TRUE
FALSE
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Assume that a friend hands you a heavy book to hold as he turns the combination lock on his locker. Which of you does more work?
you
your friend
you both do the same amount of work
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Work is done when a body moves through a certain distance in the direction of application of force
True
False
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Energy transfer takes place during the process of work.
TRUE
FALSE
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Choose the ways that machines may change a force.
increasing the force
increasing speed
changing the direction of the force
All of the above
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
If a machine requires an input of 5,000 joules of work to put out 4,000 joules of work, what is the machine’s efficiency?
80%
100%
40%
60%
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