A person carries a 2.50-N pebble through the path shown in the figure, starting at point A and ending at point B. The total time from A to B is 405s. How much work did gravity do on the rock between A and B?
Work & Energy

Quiz
•
Physics
•
11th - 12th Grade
•
Hard
Reginald Mosley
Used 42+ times
FREE Resource
16 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
45 J
-45 J
37.5 J
-37.5 J
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A person carries a 2.50-N pebble through the path shown in the figure, starting at point A and ending at point B. The total time from A to B is 405s. How much work did the person do on the rock between A and B?
45 J
-45 J
37.5 J
-37.5 J
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Linda does four times as much work as James does and in one-third the time. Linda’s power output is ________.
four times James’ power output
the same as James’ power output
twelve times James’ power output
cannot be determined
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Work is ____.
a scalar
a vector
neither a scalar nor vector
both a scalar and vector
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is the kinetic energy of a 50 N boulder resting at the top of a 25 m cliff?
1250 J
625 J
0 J
12500 J
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Two objects, one of mass m and the other of mass 2m, are dropped from the top of a building. If there is no air resistance, when they hit the ground _______.
the heavier one will have half the kinetic energy of the lighter one
the heavier one will have twice the kinetic energy of the lighter one
the heavier one will have one-fourth the kinetic energy of the lighter one
the heavier one will have four times the kinetic energy of the lighter one
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Three cars (car A, car B, and car C) are moving with the same speed when the drivers slam on their brakes. The most massive car is car A, and the least massive is car C. If the tires of all three cars have identical coefficients of kinetic friction with the road surface, for which car is the amount of work done by friction in stopping it the greatest?
The amount of work done by friction is the same for all cars.
Car A
Car B
Car C
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