Projectile Motion

Question 1

Projectile motion can be used to describe what?

Answer 1

How a point or a body moves when it is airborne.

Question 2

When can air resistance be ignored and when can it not?

Give examples with shapes.

Answer 2

A feather - air resistance cannot be ignored.

A solid sphere - air resistance can be ignored.

Question 3

State the 4 uniform acceleration motion equations.

Answer 3

s = ut + 1/2at^2

v = u + at

v^2 = u^2 + 2as

s = 1/2(u+v)t

Question 4

If air resistance wasn’t ignored with a solid sphere, what would happen to the acceleration of the object?

Answer 4

Acceleration would not be constant.

Question 5

The vertical component of a projectile motion is classified as the non-zero axis. What is the main contributing factor?

Answer 5

Acceleration due to gravity.

Question 6

TRUE OR FALSE:

Gravity acts in the horizontal axis in a projectile motion?

Answer 6

FALSE

Question 7

A parabola is what?

Answer 7

A distinctive projectile shape.

Question 8

What two points of a body will always follow a parabola?

Answer 8

CoM and CoG.

Question 9

What things affect the range of projectile?

Answer 9

1. Release velocity
2. Release angle
3. Height of release

Question 10

What is the optimum release angle?

Answer 10

45

Question 11

State the steps in solving projectile motion problems.

Answer 11

1. Divide into vertical and horizontal parts.
2. Solve for the vertical or horizontal with the info given.
3. Apply the correct constant acceleration equations to calculate the unknown.
4. Use the info from one component to solve the other.
5. Check