Circular & Torque Review

What is the weight of the package?

• 5 N
• 10 N
• 15 N
• 20 N

Tags

NGSS.HS-PS2-1

What is the Unit for Torque

• Nm
• N
• W
• J

Answer explanation

Torque = Force x Torque Arm Length

Torque = N x m

The red arrows represent possible forces applied to the wrench. If all are an equal number of newtons, which will produce the most torque?

• A

• B

• C or D

• All produce the same amount of torque

Answer explanation

B is perpendicular

It is possible that 5 N of force can produce more torque than 25 N of force

• True

• False

• This makes no sense at all

Answer explanation

Torque = Force x Torque Arm Length

The 5 N force can produce more torque than a 25N force by having more than 5x the torque are length.

Which will produce more torque to loosen the lug nut?

• A
• B
• They are the same

Answer explanation

B has a longer torque arm.

Looking at the picture, which way will it rotate?

• Clockwise
• Counter clockwise
• Neither

Answer explanation

Counter clockwise :

(1 kg )(9.81 m/s²)(2m) = 19.62 Nm

Clockwise :

(2 kg )(9.81 m/s²)(1m) = 19.62 Nm

A small but hard nut must be crushed.  Which position will require more squeezing force by a hand?

• Position A
• Position B
• It doesn't matter which position the nut is in.

Answer explanation

Position A has a longer torque arm to resist your efforts.

Tags

NGSS.HS-PS2-1

Which requires more muscle strength (pull by the muscle) to lift a 25 pound dumbbell?

• An arm with a longer forearm
• An arm with a shorter forearm
• The length doesn't matter

Answer explanation

A longer forearm gives a longer torque arm to the load that is resisting the effort of the muscle. This means that the muscle must pull with more force.

Will the torque be increased by using the rope?

• A - Yes
• B - No

Answer explanation

Did the rope produce a longer torque arm? Nope

What is the weight of the package?

• 5 N
• 10 N
• 15 N
• 20 N

Tags

NGSS.HS-PS2-1