Module 7: Uniform Circular Motion and Gravity

Question 1

Define Uniform Circular motion

Answer 1

A particle that is moving in a circle at a constant speed.

Question 2

What is necessary for any kind of circular motion?

Answer 2

Centripetal force is necessary for any kind of circular motion

Question 3

What is the Centripetal Force Formula?

Answer 3

Fc = mv^2 / r
    Fc —> Centripetal force
    m —> Mass of the moving object
    v —> Speed of the object
    r —> Radius of the circle

Question 4

What is the Acceleration Formula (for centripetal force)?

Answer 4

a = v^2 / r

Question 5

Define Centripetal force.

Answer 5

The force necessary to make an object move in a circle

Question 6

Define Centripetal acceleration.

Answer 6

The acceleration caused by centripetal force

Question 7

On a flat curve, does the mass of the car does affect the speed at which it can stay on the curve?

Answer 7

No! On a flat curve, the mass of the car does NOT affect the speed at which it can stay on the curve.

Question 8

What is the Law of Universal Gravitation?

Answer 8

Fg = Gm1m2 / r2
Fg —> Force due to gravity
G —> The universal gravitational constant = 6.67 x 10 -11 (Newton x m2 / kg2)
m1, m2 —> Masses of the objects being referred to
R —> The distance between the centers of the two objects

Question 9

Define Gravity.

Answer 9

The attractive force that exists between all objects which have mass

Question 10

Define Period (T).

Answer 10

The time it takes for an object in uniform circular motion to travel through one full circle

Question 11

Define Frequency (f)

Answer 11

The number of times per second an object in uniform circular motion travels around the circle