Chapter 4: Motion In Two & Three Dimensions

Question 1

To consider a vector quantity in two or more dimensions, you…

Answer 1

Split it up and solve by its x, y, and/or z components–DO NOT mix them!

Question 2

What is range (in terms of projectiles)?

Answer 2

The horizontal distance traveled by said projectile.

Question 3

What is uniform circular motion?

Answer 3

Motion in which the path (trajectory) is a circle.

Question 4

In UCM, velocity is directed ___ to the circle.

Answer 4

Tangent

Question 5

In UCM, acceleration is directed ___ the center of the circle.

Answer 5

Towards

Question 6

Equation of a circle:

Answer 6

(x - x(subc))^2 + (y - y(subc))^2 = R^2

Question 7

Acceleration directed towards the center of the circle is called ___ acceleration.

Answer 7

Centripetal

Question 8

What is a period?

Answer 8

The time to complete one revolution. circumference/speed. T = (2πR)/v

Question 9

Position and velocity of a particle depend on the ___ ___ used for measurement.

Answer 9

Reference frame

Question 10

Can reference frames move?

Answer 10

Yes! They can either move of be stable.