Understanding Torque in Rotational Motion

This video tutorial by Mr. Anderson covers the concept of torque in physics, explaining its definition as the product of force and lever arm in rotational motion. The video illustrates the difference between translational and rotational motion using a wrench and discusses the importance of the lever arm's perpendicularity to the axis of rotation. It also explains how torque is calculated and provides practical examples, such as doors and seesaws, to demonstrate balanced systems and the effects of different forces and lever arm lengths on torque.

What type of motion occurs when a force is applied at the center of gravity of an object?

• Rotational motion

• Translational motion

• Vibrational motion

• Oscillatory motion

Torque is the product of which two components?

• Velocity and time

• Force and mass

• Mass and acceleration

• Force and lever arm

Why is the door knob placed far from the hinge?

• To prevent the door from swinging

• To balance the door's weight

• To increase the torque for easier opening

• To reduce the force needed to open the door

If a door knob is moved closer to the hinge, what happens to the torque?

• It remains the same

• It decreases

• It doubles

• It increases

In a balanced seesaw, what is true about the torques on either side?

• They are equal

• They are unequal

• One side has more torque

• They depend on the length of the seesaw

How can you balance a seesaw with different weights on each side?

• By reducing the length of the seesaw

• By moving the lighter weight further from the fulcrum

• By moving the heavier weight closer to the fulcrum

• By increasing the weight on the lighter side

What happens to the torque if the force applied is increased?

• The torque becomes zero

• The torque decreases

• The torque increases

• The torque remains the same

What is the unit of torque?

• Newton

• Joule

• Newton meter

• Watt

What is the effect of decreasing the lever arm on torque?

• Torque remains constant

• Torque increases

• Torque decreases

• Torque becomes negative

Which experiment can help understand balanced forces and torque?

• Using a spring

• Using a teeter-totter

• Using a pulley

• Using a pendulum