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WorksheetsMechanical Work
Total questions: 23
Worksheet time: 18mins
Name
Class
Date
1.
37 Newtons of force are required to lift a mass 3.5 meters above the floor. How many newton.meters of work is done?
W=F x d
W=F x d
a)
12.95
b)
129.5
c)
1295
d)
1480
2.
Which of the following is NOT an effect of mechanical work on an object?
a)
The object moves.
b)
The object changes shape.
c)
The object changes direction.
d)
The object remains in place.
3.
The prime mover in an angular mechanical system is called torque which is determined by multiplying the force applied, by the lever arm. The lever arm is equal to the:
a)
Diameter of the circle.
b)
Radius of the circle in which the force is applied.
c)
Circumference of the circle in which the force is applied.
d)
Arc of the circle.
4.
How much work is being done by a person holding a 60 pound suitcase 18 inches above the floor?
a)
90 ftxlb
b)
1080 in×lb
c)
6N
d)
None
5.
A vertical force raises a 200 lb. barbell 5ft. the amount of work done is:
a)
1000 lbs.
b)
1000 ft.
c)
1000 ft.xlbs.
d)
1000 lb.xft.
6.
Two hundred newtons of force are required to lift a mass 1.2 meters above the floor. How many newton.meters of work is done?
W=f × d
W=f × d
a)
480
b)
240
c)
120
d)
60
7.
520 Nxm of work is done when a 50 newton force is moved a distance. How far is the load moved?
W=fxd
W=fxd
a)
10.2 meters
b)
10.4 meters
c)
26,000 meters
d)
26,500 meters
8.
How much work is done while an electric motor drives a pump through 40 revolutions, given the motor delivers 150 Vxm of torque?
a)
6000 joules
b)
20400 joules
c)
28500 joules
d)
37680 joules
9.
Work done by a torque is equal to the torque applied times the:
a)
Length of arm.
b)
Angle moved through.
c)
Radius.
d)
Diameter.
10.
The length of the radius of a circle measured on the circumference is one:
a)
Joule.
b)
Radian.
c)
Meter.
d)
Arc.
11.
A vertical force raises a 150 lb. box 6 ft. The amount of work done is:
W= F x d
W= F x d
a)
25 lbs.
b)
25ft x lbs
c)
600 ft. x lbs.
d)
900 ft x lbs.
12.
A loaded cart is pulled a distance of 100 meters by an electric truck that exerts 900 newtons of force to pull the cart at a constant speed. if the 100 meters is covered in 12 seconds, how much work is done?
W=F x d
W=F x d
a)
9.0 x 104Nxm
b)
7.6 x 104Nxm/sec
c)
2.5 x 104Nxm
d)
1.08 x 104Nxm/sec
13.
A wrench with an 18 inch handle turns through an angle of 2.3 radians while a force of 50 lbs. is applied to the end of the handle. How much work is done?
T= F x L
W= T x Θ
T= F x L
W= T x Θ
a)
2070 in.lb
b)
1070 in.lb
c)
207 ft.lb
d)
1070 ft.lb
14.
A force that opposes the movement of one solid in contact with another solid.
a)
Friction
b)
Efficiency
c)
Radian
d)
Motor
15.
Define Radian
a)
The unit of work in the English system of measure.
b)
A unit of power in the English system.
c)
The unit angle of measure equal to 57.3 degrees.
d)
A measure of how fast work is done.
16.
Which of the following correctly defines "Unifying Concept".
a)
The unit of work in the English system of measure.
b)
A concept that has common application in several energy systems.
c)
A unit of work in the SI system of measure.
d)
A unit of work measurement in the SI system of units.
17.
A ratio of the output work delivered by a machine to the input work done on the machine to operate it.
a)
Power
b)
Friction
c)
Radian
d)
Efficiency
18.
Define Foot-Pound
a)
A unit of power in the English system.
b)
The unit of work in the English system of measure.
c)
The unit of work in the SI system of measure.
d)
A unit of work measurement in the SI system of units.
19.
Pi is correctly defined as
a)
It is equal to the ratio of the circumference of any circle and its diameter.
b)
The unit of work in the English system of measure
c)
A unit of work in the SI system of measure.
d)
Something eaten as dessert.
20.
An arrangement of pulleys without gears with lines connected in such a way to make the movement of heavy objects easier we used in a lab.
a)
Block and Tackle
b)
Joule
c)
Thing-a-ma-bob
d)
Winch
21.
Define Joule
a)
A unit of work measurement in the SI system of units.
b)
A unit of power in the English system.
c)
The unit of work in the English system of measure.
d)
A device with gears used in our labs
22.
The product of the force applies to an object along its direction of motion and the distance the object moves while the force is applied.
a)
Electrical Work
b)
Mechanical Work
c)
Fluid Work
23.
A unit of work in the SI system of measure.
a)
Newton-Meter
b)
Meter
c)
Newton
d)
lb-ft
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