Rotation and Torque Practice

Front

What is Torque?

Back

Torque is a measure of the rotational force applied to an object, calculated as the product of the force and the distance from the pivot point (Torque = Force x Distance).

Front

What is the unit of Torque?

Back

The unit of Torque is Newton-meter (Nm).

Front

What direction does torque act in relation to the pivot point?

Back

Torque can act in a clockwise or counterclockwise direction depending on the direction of the applied force.

Front

How do you calculate angular acceleration?

Back

Angular acceleration (α) is calculated by the change in angular velocity (Δω) divided by the time interval (Δt): α = Δω / Δt.

Front

What is the formula for angular displacement?

Back

Angular displacement (θ) can be calculated using the formula: θ = ω_initial * t + 0.5 * α * t^2, where ω_initial is the initial angular velocity.

Front

If a merry-go-round starts from rest and reaches an angular speed of 2 radians/second in 3 seconds, what is its angular acceleration?

Back

The angular acceleration (α) is 2/3 rad/s².

Front

What is the relationship between torque and angular acceleration?

Back

Torque (τ) is related to angular acceleration (α) by the equation τ = I * α, where I is the moment of inertia.

Front

What is the moment of inertia?

Back

The moment of inertia (I) is a measure of an object's resistance to changes in its rotation, depending on the mass distribution relative to the axis of rotation.

Front

What is the effect of increasing the distance from the pivot point on torque?

Back

Increasing the distance from the pivot point increases the torque for a given force, making it easier to rotate the object.

Front

What is the formula for calculating torque?

Back

Torque (τ) is calculated using the formula: τ = r * F * sin(θ), where r is the distance from the pivot, F is the force applied, and θ is the angle between the force and the lever arm.