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WorksheetsTOPIC 4_WORK
Total questions: 30
Worksheet time: 24mins
No, force is applied perpendicular to the direction of the distance traveled.
throwing the bookbag
What is the SI unit of work?
How much work is done on a 200-kg crate that is raised 2 m through a pulley in a time of 4 s?
1600 J
1600.00 J
3920 J
3920.00 J
Which statement illustrates work done?
A weightlifter holds a barbell above her head.
A teacher applies a force to a wall and becomes exhausted.
A rolling marble hits a note card and moves it across a table.
A waiter carries a tray full of meals across a dining room at a constant speed.
A weightlifter holds a 100 kg barbell above her head. Is work done?
Yes because there is a force applied to the barbell and the force causes a displacement of the barbell.
Yes because there is an upward force applied to the barbell and the barbell moves vertically.
No because no displacement occurred.
No because there is no force applied.
If you pull the trolley vertically upwards using a crane. Which force do you use to calculate the work done?
Weight
Pulling force
Is work a scalar or vector quantity?
vector
scalar
both
none of the above
A 5000 N block is lifted 10 m. How much work was done?
50, 000.00 J
50, 000 J
500.00 J
500 J
The work done on an object does not depend upon the
(a) displacement
(b) force applied
(c) angle between force and displacement
(d) initial velocity of the object
a
b
c
d
In case of negative work, the angle between the force and displacement is
(a) 0
(b) 45°
(c) 90°
(d) 180°
a
b
c
d
In case of zero work, the angle between the force and displacement is
(a) 0
(b) 45°
(c) 90°
(d) 180°
a
b
c
d
In case of positive work, the angle between the force and displacement is
(a) 0
(b) 45°
(c) 90°
(d) 180°
a
b
c
d
Work is a transfer of
energy
force
mass
motion
Which is true about a force acting perpendicular to the motion of an object?
It adds to the work causing motion.
It does not contribute to the work.
It subtracts from the work causing motion.
It adds to the friction force.
What type of work does friction do on a skateboarder going up a ramp?
negative
positive
perpendicular
friction never does work
Which requires more work – a person walking up stairs or a person running up stairs?
walking
running
they require equal work
no work is required for either because the movement is vertical
A force is pushed perpendicularly onto an object with force "F". If the object is flat on a surface and doesn't move, is there work being done?
Yes; a force is being applied
No; a force is applied but not distance is being covered
Yes; a distance is covered with a force
No; a force is applied
The units for work are:
N*m
kg⋅s2m2
J
All of the above
Who studied the nature of heat and discovered its relationship to mechanical work?
James Prescott Joule
James Watt
Albert Einstein
Isaac Newton
What is the work done when the component of the force is the same direction as displacement?
positive
negative
zero
equal
What is the work done when the component of the force is opposite to the direction of the displacement?
positive
negative
zero
equal
What is the work done when the component of the force is perpendicular to the direction of the displacement?
positive
negative
zero
equal
The work done on object by force of gravity (weight) applies to which scenarios?
lifting objects
carrying objects
pushing objects
pulling objects
Which of the following is not doing work?
a girl walking up the stairs
a boy pushing a wall
a mother carrying her baby
a student thinking on something
