Work in Mechanical Systems

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

• 12.95
• 129.5
• 1295
• 1480

Which of the following is NOT an effect of mechanical work on an object?

• The object moves.
• The object changes shape.
• The object changes direction.
• The object remains in place.

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

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:

• Diameter of the circle.
• Radius of the circle in which the force is applied.
• Circumference of the circle in which the force is applied.
• Arc of the circle.

How much work is being done by a person holding a 60 pound suitcase 18 inches above the floor?

• 90 ftxlb
• 1080 in×lb
• 6N
• None

Tags

NGSS.HS-PS3-2

A vertical force raises a 200 lb. barbell 5ft. the amount of work done is:

• 1000 lbs.
• 1000 ft.
• 1000 ft.xlbs.
• 1000 lb.xft.

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

• 480
• 240
• 120
• 60

520 Nxm of work is done when a 50 newton force is moved a distance. How far is the load moved?
W=fxd

• 10.2 meters
• 10.4 meters
• 26,000 meters
• 26,500 meters

How much work is done while an electric motor drives a pump through 40 revolutions, given the motor delivers 150 Vxm of torque?

• 6000 joules
• 20400 joules
• 28500 joules
• 37680 joules

Work done by a torque is equal to the torque applied times the:

• Length of arm.
• Angle moved through.
• Radius.
• Diameter.

The length of the radius of a circle measured on the circumference is one:

• Joule.
• Radian.
• Meter.
• Arc.