Question 1

Which of the following best describes a torque vector?

Accepted Answer

It is perpendicular to the position and force vector.

Answer

It is perpendicular to the position vector.

Answer

It is parallel to the position vector.

Answer

It is parallel to the force vector.

Question 2

Why can't you open a door by pushing on its hinged side?

Accepted Answer

Lever arm is zero.

Answer

Moment of inertia is zero.

Answer

Force is zero.

Answer

Torque is negative.

Question 3

You are using a wrench and trying to loosen a rusty nut. Which of the arrangements shown is least effective in loosening the nut?

Accepted Answer

C

Answer

B

Answer

D

Answer

A

Question 4

Which of the following best describes equilibrium?

Accepted Answer

The net torques and forces are equal to zero.

Answer

All torques affecting the object is equal to zero.

Answer

All forces affecting the object is equal to zero.

Answer

The net torques and forces are the same.

Question 5

Which of the following is NOT correct about the concept of torque?

Accepted Answer

All forces that tend to rotate the object in the same direction produce torque with unlike sign.

Answer

A net torque equals zero means the object is not going to rotate.

Answer

It is tendency to cause or change a body’s rotational motion.

Answer

It can be quantitively describe through cross product.

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