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  1. AP Physics 1 Revised
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What is the difference between force and torque?

Force: A linear push or pull. | Torque: A rotational force that causes objects to spin.

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What is the difference between force and torque?

Force: A linear push or pull. | Torque: A rotational force that causes objects to spin.

What is the difference between the lever arm and the distance from the axis of rotation to the point of force application?

Lever arm: The perpendicular distance. | Distance: The direct distance, which may not be perpendicular and thus not used directly in torque calculation.

What is torque?

The rotational equivalent of force; what causes objects to spin.

Define lever arm.

The perpendicular distance from the axis of rotation to the point where the force is applied.

What is the position vector (r⃗\vec{r}r) in the context of torque?

A vector pointing from the axis of rotation to the point where the force is applied.

Define the cross product in relation to torque.

The mathematical operation used to calculate torque, given by τ⃗=r⃗×F⃗\vec{\tau} = \vec{r} \times \vec{F}τ=r×F.

What is the right-hand rule used for in the context of torque?

A method to determine the direction of the torque vector, which is perpendicular to both the position vector and the force vector.

How do you determine the direction of torque using the right-hand rule?

  1. Point your fingers in the direction of r⃗\vec{r}r. 2. Curl your fingers towards the direction of F⃗\vec{F}F. 3. Your thumb points in the direction of the torque τ⃗\vec{\tau}τ.

What are the steps to calculating torque when the force is at an angle?

  1. Break down the force into components. 2. Identify the perpendicular component to the lever arm. 3. Calculate torque using the perpendicular component and the lever arm length.

How do you calculate the magnitude of torque using the cross product?

  1. Identify the magnitudes of r⃗\vec{r}r and F⃗\vec{F}F. 2. Determine the angle θ\thetaθ between r⃗\vec{r}r and F⃗\vec{F}F. 3. Calculate ∣overrightarrowτ∣=rFsin⁡θ|overrightarrow{\tau}| = rF \sin \theta∣overrightarrowτ∣=rFsinθ.