# Unit 7: Torque and Rotational Motion

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What is rotational motion?

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## Tags and Description

### 20 Terms

1

What is rotational motion?

Rotational motion is the motion of an object around an axis or a fixed point.

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2

What is linear kinematics?

Linear kinematics is the study of motion of objects in a straight line.

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3

What is rotational kinematics?

Rotational kinematics is the study of motion of objects that rotate around a fixed axis.

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4

What is force?

Force is a push or pull that can cause a change in motion.

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5

What is torque?

Torque is the force that causes an object to rotate about an axis.

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6

What is mass?

Mass is the amount of matter in an object.

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7

What is moment of inertia?

Moment of inertia is the resistance of an object to rotational motion.

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8

What is acceleration?

Acceleration is the rate at which an object changes its velocity.

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9

What is angular acceleration?

Angular acceleration is the rate of change of angular velocity with respect to time.

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10

What is the equation for Fnet?

Fnet = ma

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11

What is the equation for Tnet?

Tnet = Ia

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12

What is velocity?

Velocity is the speed and direction of an object's motion.

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13

What is angular velocity?

Angular velocity is the rate of change of angular displacement with respect to time.

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14

What is angular displacement?

Angular displacement is the angle through which an object rotates.

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15

What is the relationship between linear and angular motion?

The linear velocity and acceleration of a point on a rotating object are equal to the product of the angular velocity and acceleration and the radius of the circle.

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16

What is center of mass?

Center of mass is the point in an object or system that moves as if all the mass were concentrated at that point.

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17

What is the formula for calculating center of mass?

COM = (m1r1 + m2r2 + ... + mn rn) / (m1 + m2 + ... + mn)

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18

What is the right-hand rule?

The right-hand rule is a rule used to determine the direction of torque.

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19

What is the formula for torque?

τ = r x F

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20

What is the unit of torque in the US customary system?

The unit of torque in the US customary system is the foot-pound (f

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