Balancing Torque

The easiest way to open a heavy door  is by applying the force

• Near the hinges
• In the middle of the door
• At the edge of the door far from the hinges
• At the top of the door

A 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?

• 0.75m
• 3m
• 1.5m
• 1m

Tags

NGSS.MS-PS2-2

What is the Unit for Torque

• Nm
• N
• W
• J

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-ETS1-3

When an object is experiencing a net torque

• it is in dynamic equilibrium.
• it is in static equilibrium.
• it is rotating.
• it is translating.

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

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?

• .666 Nm
•  133.3 N
• 66.7 N
• 13.3 Nm

A beam with a length of L is lifted from one end with a force of F1.  If the beam doubles in length but contains the same mass, what will the force required to lift it be in terms of F1?

• F1
• 1/2 F1
• 2 F1
• 1/4 F1

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

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 cars on the right-hand side, are ____meters from the fulcrum.

• 4.5 m

• 3 m

• 1 m

• 2 m