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- 1. Multiple Choice
When solving a torque problem, all lever arms are measured from the ...
end of the bar
pivot or fulcrum
center of the bar
center of the mass
- 2. Multiple Choice
As shown above, a rod with a length L is free to rotate about point A. An external force F is applied perpendicular to the rod. In which of the following cases is the torque on the rod the same as the above?
- 3. Multiple Choice
A state of equilibrium is also seen in the diagram. Each of the cars weighs the same 9800 N. Despite the fact that there is only one car on the left-hand side that is 9 m from the fulcrum, the torques balance because, the cars on the right-hand side, are ____meters from the fulcrum.
4.5 m
3 m
1 m
2 m
- 4. Multiple ChoiceFind the magnitude of the torque produced by a 5.0 N force applied to a door at a perpendicular distance of 65 cm from the hinge.75 Nm3.25 Nm6.3 Nm8.75 Nm
- 5. Multiple ChoiceDoes a bridge anchored resting on two pillars have any torque?No, it isn't movingYes, but it is at equilibriumYes, but it will soon break because of the torqueNo, Bridges can't have torque
- 6. Multiple ChoiceA construction worker is worried about applying too much torque to a bolt using his wrench. What could he do to reduce his torque on the bolt?Increase the length of the wrenchIncrease the force on wrenchReduce the length of the wrenchReduce the friction between the bolt and wrench
- 7. Multiple Choice
When an object is experiencing a net torque?
it is in dynamic equilibrium.
it is in static equilibrium.
it is rotating.
it is translating.
- 8. Multiple Choice
"A point at which entire weight of object concentrated toward the earth".
Identify the concept explained in the statement above.
Free body diagram
Concurrent forces
Center of gravity
Rigid body
- 9. Multiple Choice
Conditions for equilibrium are:
1st condition: net force = 0
2nd condition:net torque = 0
Moving with constant velocity or Stationary/ rest
True
False
- 10. Multiple Choice
The study of forces in equilibrium is called
statics
dynamics
equilibriation
kinematics
- 11. Multiple ChoiceThe easiest way to open a heavy door is by applying the forceNear the hingesIn the middle of the doorAt the edge of the door far from the hingesAt the top of the door
- 12. Multiple Choice
In the diagram, two masses, one with mass m, the other with mass M = 2m are resting on a uniform plank of length L that pivots at its midpoint. If the mass m is at the far end of the plank, how far away from the pivot should the mass M be to balance the plank in a horizontal position shown?
L/2
L/3
L/4
L/6
- 13. Multiple ChoiceHow do you get the maximum torque?longer lever arm and less force at an acute angleshorter lever arm and less force perpendicularlyshorter lever arm and more force perpendicularlylonger lever arm and more force perpendicularly
- 14. Multiple ChoiceA solid metal bar is at rest on a horizontal frictionless surface. It is free to rotate about a vertical axis at the left end. The figures show forces of different magnitudes that are exerted on the bar at different locations. In which case does the bar's angular speed about the axis increase at the fastest rate?ABCD
- 15. Multiple Choice
A disk initially rotating counterclockwise (CCW) at a certain constant angular speed is suddenly being pulled on by two strings T1 and T2, where T2 > T1. What is going to happen next?
The disk will continued rotating CCW at the constant angular speed.
The disk will continued rotating CCW but it will speed up
The disk will slow down and start rotating CW
The disk will eventually stop rotating
- 16. Multiple Choice
In what direction is torque considered negative?
clockwise
counter clockwise
- 17. Multiple Choice
The study of forces is called...
statics
dynamics
equilibriation
kinematics
- 18. Multiple Choice
The study of objects in motion is called...
statics
dynamics
equilibriation
kinematics
- 19. Multiple Choice
What is the effect of putting a fulcrum in a particular place? Click both correct answers
it removes the force from the problem
it acts as a new support
It reduces the length of the lever arms
it gets rid of the mass of the object
- 20. Multiple Choice
Which rope will have the greater force?
each rope has the same force
the rope closer to the child
the rope on the dog's end
- 21. Multiple ChoiceWhich of these has the greatest centripetal acceleration?Large Velocity, Large RadiusSmall Velocity, Small RadiusLarge Velocity, Small RadiusSmall Velocity, Large Radius
- 22. Multiple ChoiceThe center of mass is:the exact middlethe heaviest partthe point at which you can balance with one fingerthe idea that mass is concentrated throughout
- 23. Multiple ChoiceTwo bugs ride a turntable which is rotating at a constant rate of 4 rad/s. Bug A is at a radius of 4 cm, while bug B is at a radius of 8 cm. Which of the following is true?Bug A has a greater rotational speed.Bug B has a greater rotational speed.Bug A has a greater speed.Bug B has a greater speed.
- 24. Multiple ChoiceLooking at the picture, which way will it rotate?ClockwiseCounter clockwiseNeither
- 25. Multiple ChoiceA 800N man is playing on a seesaw with son who has a weight of 200N. If the child is sitting 3 meters away, how far will the man have to sit to balance the seesaw?0.75m3m1.5m1m
- 26. Multiple ChoiceWhat is the Unit for TorqueNmNWJ
- 27. Multiple Choice
What is the net torque?
2 Nm
5 Nm
10 Nm
25 Nm
- Answer choicesTagsAnswer choicesTags