Work and Energy CBSE 9
Assessment
•
Harshini Madan
•
Physics, Science
•
9th Grade
•
1 plays
•
Medium
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23 questions
Show answers
1.
Multiple Select
What is the S.I unit of work?
N.m2
(Kg.m2) / s2
J/m
J
2.
Multiple Choice
In which scenario is work = 0 J ?
Pushing a stationary wall
Pulling a trolley car
Pushing a book across the table
Dropping a set of keys from a height, h.
3.
Multiple Choice
Power depends on force and speed.
True
False
4.
Multiple Choice
Work is zero if the force has a component in the direction opposite of motion.
True
False
5.
Multiple Choice
A 3 kg plate is tossed across the room with an acceleration of 13 m/s2 in 2.5 sec. Calculate the amount of power it took to toss the plate.
290.5 W
1267.5 W
507 W
3000 W
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