AP Torque and Equilibrium

If the torque required to loosen a nut on the wheel of a car has a magnitude of 60.0 N• m, what minimum perpendicular force must be exerted by a mechanic at the end of a 45.0 cm wrench to loosen the nut?

• 0.666 Nm

•  133.3 N

• 66.7 N

• 13.3 Nm

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

A state of equilibrium is also seen below. 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 car on the left-hand side, is ____meters from the fulcrum, compared to the cars on the right-hand side.

• 4.5 m

• 3 m

• 1 m

• 2 m

Tags

NGSS.MS-PS2-4

In the diagram above, 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

Tags

NGSS.HS-PS2-1

If the crate is to remain stationary, what amount of force must be applied for "z"?

• 800 N

• 1200 N

• 2000 N

• 2400 N

Tags

NGSS.HS-PS2-1

The figure above shows a uniform meterstick that is set on a fulcrum at its center. A force of magnitude F toward the bottom of the page is exerted on the meterstick at the position shown. At which of the labeled positions must an upward force of magnitude 2F be exerted on the meterstick to keep the meterstick in equilibrium?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

What direction is the torque acting with respect to post A?

• clockwise

• Counter clockwise

• Neither Direction

• Depends on the mass of the diver

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

You apply force to a wrench to tighten a bolt. The wrench breaks in half. Select the best answer for what happens next. Assume the force applied remains constant.

• The torque is now half of what it was, because torque and distance are inversely proportional

• The torque is now half of what it was, because torque and distance are directly proportional

• The torque is now double of what it was, because torque and distance are inversely proportional

• The torque is now double of what it was, because torque and distance are directly proportional

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 > T_1. 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

Tags

NGSS.HS-PS2-1