Projectiles

Question 1

What do we resolve the initial velocity of a projectile into?

Answer 1

Initial HORIZONTAL Velocity

Initial VERTICAL Velocity

Question 2

How do you calculate the initial HORIZONTAL Velocity?

Answer 2

v X cos(angle)

Question 3

How do you calculate the Initial VERTICAL Velocity?

Answer 3

v X sin(angle)

Question 4

Ignoring air resistance what is the only force acting on the projectile during its flight?

Answer 4

Gravity

Question 5

Because Gravity is the only force affecting the projectile whilst its in the air what component do we need to worry about on its decent?

Answer 5

The Vertical Component of the Velocity

Question 6

If the horizontal direction experiences no acceleration, what can we assume about the horizontal velocity of the flight?

Answer 6

The horizontal velocity remains constant (assuming there is no air resistance)

Question 7

What kind of path does the projectile follow?

Answer 7

A parabolic path

Question 8

How do we calculate the distance the ball travels?

Answer 8

Multiplying Horizontal Velocity by the Time of Flight

Question 9

When asked to find the time taken what do you use to calculate it?

Answer 9

SUVAT

Question 10

When asked to find the magnitude of the projectile what do you use?

Answer 10

SUVAT

Question 11

When asked to find the distance it lands from what calculation do you use?

Answer 11

Horizontal Distance = Horizontal Velocity X Time of Flight

Question 12

When air resistance is taken into account what can it do?

Answer 12

Reduce the horizontal distance and the maximum height

Question 13

At low speeds what is the relationship between drag and velocity?

Answer 13

Drag is proportional to Velocity (AT SLOW SPEEDS)

Question 14

At higher speeds what is the relationship between drag and velocity?

Answer 14

Drag equals velocity squared (AT HIGHER SPEEDS)

Question 15

How would the projectile fall if its horizontal velocity is 0?

Answer 15

It would fall vertically.