Rotation and Torque - Physics 101 / AP Physics 1 Review with Dianna Cowern

The video explores rotational motion, focusing on Earth's rotation and its effects on linear and angular velocity. It introduces torque, explaining its application in everyday objects like doors and screwdrivers. The video concludes with a discussion on special relativity, highlighting the impossibility of truly rigid objects.

What is the angular velocity of Earth in radians per second?

• 0.5 radians per second

• 3.14 radians per second

• 7.27 * 10^-5 radians per second

• 1.0 radians per second

How do you convert angular velocity to linear velocity?

• Add the radius

• Divide by the radius

• Subtract the radius

• Multiply by the radius

What force keeps a bug on a spinning record?

• Friction force

• Electrostatic force

• Magnetic force

• Gravitational force

What is the symbol for torque in physics?

• Alpha (α)

• Beta (β)

• Tau (τ)

• Omega (ω)

Why is it easier to open a door from the handle rather than near the hinge?

• The hinge provides less resistance

• Greater torque is applied further from the axis of rotation

• The handle is designed to be more ergonomic

• The door is lighter at the handle

What is the effect of torque on a spinning egg?

• It makes the egg spin faster

• It changes the color of the egg

• It can make the egg stand up

• It stops the egg from spinning

How does a screwdriver multiply force?

• By increasing the length of the handle

• By applying torque at a small radius

• By reducing friction

• By using a lever mechanism

What happens to objects moving close to the speed of light according to special relativity?

• They expand in length

• They become lighter

• They contract in length

• They become heavier

What is the center of mass?

• The point where all mass is concentrated

• The heaviest part of an object

• The geometric center of an object

• The lightest part of an object

Why can't objects be truly rigid according to special relativity?

• Because they are affected by gravity

• Because they expand when heated

• Because they are made of atoms

• Because moving objects contract