AP Physics Torque Problems

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

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?

• 
• 
• 
• 

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

Find 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 Nm
• 3.25 Nm
• 6.3 Nm
• 8.75 Nm

Does a bridge anchored resting on two pillars have any torque?

• No, it isn't moving
• Yes, but it is at equilibrium
• Yes, but it will soon break because of the torque
• No, Bridges can't have torque

Tags

NGSS.HS-PS2-1

A 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 wrench
• Increase the force on wrench
• Reduce the length of the wrench
• Reduce the friction between the bolt and wrench

When an object is experiencing a net torque?

• it is in dynamic equilibrium.

• it is in static equilibrium.

• it is rotating.

• it is translating.

"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

Conditions for equilibrium are:

1st condition: net force = 0

2nd condition:net torque = 0

Moving with constant velocity or Stationary/ rest

• True

• False

The study of forces in equilibrium is called

• statics

• dynamics

• equilibriation

• kinematics