# Unit 3: Circular Motion and Gravitation

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What is Uniform Circular Motion?

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## Tags and Description

AP Physics 1: Algebra-Based

### 20 Terms

1

What is Uniform Circular Motion?

Uniform circular motion is the motion of an object moving in a circular path at a constant speed.

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2

How does velocity change in Uniform Circular Motion?

In Uniform Circular Motion, although the speed may be constant, the velocity is not because the direction is always changing.

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3

What causes acceleration in Uniform Circular Motion?

Since the velocity is changing in Uniform Circular Motion, there must be acceleration.

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4

What is Centripetal Force?

Centripetal force is the force that acts on an object moving in a circular path, directed towards the center of the circle.

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5

What is the purpose of Centripetal Force?

Centripetal force is responsible for keeping the object moving in a circular path.

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6

What is Centripetal Acceleration?

Centripetal acceleration is what turns the velocity vectors to keep the object traveling in a circle.

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7

What is the formula for Centripetal Acceleration?

a꜀ = v^2/r

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8

What is the formula for Centripetal Force?

F = mv^2 / r

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9

What are some examples of Uniform Circular Motion?

Examples include a car around a circular track, a satellite orbiting the Earth, and a ball on a string being swung in a circle.

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10

What are the four fundamental forces in physics?

The four fundamental forces in physics are the gravitational force, the electromagnetic force, the weak force, and the strong force.

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11

What dominates at the largest mass and distance scales?

Gravity dominates at the largest mass and distance scales because its effects are proportional to the mass of the objects involved.

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12

What is the Gravitational Force?

The gravitational force is the force of attraction between two masses.

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13

What is the formula for Gravitational Force?

F = G * (m1 * m2) / r^2

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14

What is the Coulomb's Law?

Coulomb's Law describes the attractive or repulsive force between two charged objects.

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15

What is the formula for Electric Force?

F = k * (q1 * q2) / r^2

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16

What is Gravitational Acceleration?

Gravitational acceleration is the acceleration experienced by an object due to the force of gravity.

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17

What is the formula for Gravitational Acceleration?

g = G * M / r^2

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18

What is the value of gravitational acceleration on Earth?

On Earth, the value of gravitational acceleration is approximately 9.81 m/s^2.

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19

What happens to an object in free fall?

If an object is in free fall, the gravitational force is the only force being exerted on the object.

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20

What is the formula for Gravitational Field?

g = Gm/r^2

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