2.2 Torque

Torque is

• Speed of an object
• Linear force applied to an object
• Pressure applied to an object
• Rotational force applied to an object

Select all correct statements.

• Torque increases as the applied force increases.

• Torque increases as the distance between the applied force and the fulcrum increases.

• Torque decreases as the applied force decreases.

• Torque decreases as the applied force increases.

• Torque decreases as the distance between the applied force and the fulcrum increases.

A mechanic applies a force of 645 N perpendicular to a wrench to loosen a nut. Calculate the magnitude of the torque if the distance from the applied force to the nut is 0.7 m.

• 578.3 Nm
• 451.5 Nm
• 312.5 Nm
• 723.6 Nm

When a lever is in static equilibrium,

• T_E = T_L

• T_E > T_L

• T_E < T_L

• T_L > T_E

A 467 kg box rests on the right side of a 4.6 m steel bar. If the distance between the box and the fulcrum is 0.8 m, how much effort force is required to lift the box? Ignore the mass of the bar.

• 625.48 N
• 900.75 N
• 963.49 N

• 800.32 N

A heavy box rests on the right side of a steel bar. On your first try, you apply an effort force on the left side of the bar but are unable to lift the box. Select all things you could try to better your chances of lifting the box.

• Increase effort force

• Move the fulcrum closer to the load

• Move the fulcrum further from the load

• Increase the effort distance by using a longer bar

• Decrease the effort distance by using a shorter bar