Topic-6.2-Torque

Mansour pulls a wrench with a force of 52 N which makes an angle of 40 degree with the wrench. Find L if Mansour produces a torque of 35 Nm.

• 1.05 m

• 1.34 m

• 1.50 m

• 1.73 m

The force F is applied to the wrench to loosen a rusty bolt. The torque is 𝜏⃗ = 𝑟⃗ × 𝐹⃗ with 𝑟⃗ being the

displacement vector from the axis of rotation to where the force is applied.

What is the direction of the torque applied by this force?

• +z

• +x

• -x

• +y

The force F is applied to the wrench to loosen a rusty bolt. The torque is 𝜏⃗ = 𝑟⃗ × 𝐹⃗ with 𝑟⃗ being the

displacement vector from the axis of rotation to where the force is applied. Which of the following changes will increase the torque?

I. Using a longer wrench

II. Decreasing the angle between 𝑟⃗ and 𝐹⃗

III. Increasing the force 𝐹⃗

• I. only

• II. only

• III. only

• I and III. only

In which of the following diagrams is the torque about point O equal in magnitude to the torque about point X in the diagram below? (All forces lie in the plane of the paper)

• 
• 
• 
• 

Torque is maximum when angle between r and F is

• 0

• 45

• 90

• 180