Physics: Torque Questions Quiz

A measure of a force's ability to cause rotation around an axis.

The perpendicular distance from the axis of rotation to the force's line of action.

τ = F × d sin θ, where τ is torque, F is force, d is lever arm, and θ is the angle between F and d.

Torque that causes counter-clockwise rotation.

Torque that causes clockwise rotation.

The sum of all torques acting on an object. It determines the object's overall rotational motion.

Positive torque causes counter-clockwise rotation, while negative torque causes clockwise rotation.

The shortest distance between the axis of rotation and the line of action of a force.

Increasing the lever arm increases the torque, while decreasing it decreases the torque.

The standard unit for torque is the Newton-meter (N⋅m).

Moving the door handle to the middle of the door doubles the force needed to open it.

A longer pedal arm on a penny-farthing bicycle produces greater torque on the front wheel.

Applying force directly at the hinge of a door cannot open it. It can only break it.

Braces apply torque to teeth by applying force at a distance from the base of the teeth, the axis of rotation.

Positive torque causes counterclockwise rotation, while negative torque causes clockwise rotation.

An object is treated as a point mass if its dimensions are negligible compared to the distance it travels or its motion does not involve rotation. In simpler terms, it acts as if it's concentrated in a single point.

An object is treated as an extended object if its dimensions are significant and contribute to its motion, especially if it’s rotating.

Torque is the rotational analog of force. Just as force causes linear acceleration, torque causes angular acceleration. It's the twisting or turning effect of a force.

Torque depends on three factors - force, lever arm, and the angle between the force and lever arm. A larger force, longer lever arm, or a larger angle all lead to greater torque.

The amount of torque produced by a force depends on both the magnitude of the force and the angle between the force and the lever arm.

When a force acts directly on the axis of rotation, it produces no torque. This is because the lever arm is zero.

Forces with equal magnitudes can produce different torques depending on their lever arms (distances from the axis of rotation).

The maximum torque occurs when the force is applied perpendicular to the lever arm (angle = 90 degrees).

A crane's ability to lift heavy loads depends on its torque, which is influenced by the length of the crane arm and the angle it makes with the horizontal.

A tool mechanics use to increase torque on a bolt. It's usually a pipe that fits over a wrench handle, extending the lever arm.

The angle between the force vector and the lever arm, measured in degrees.