Week 03 - Projectile Motion & Angular Kinematics

Question 1

Any object thrown into the air is known as a _____

Answer 1

Projectile

Question 2

The path taken by the projectile through the air is known as the _______

Answer 2

Trajectory

Question 3

Vertical component is influenced by acceleration due to _________

Answer 3

Gravity

Question 4

What are the two factors that affect the trajectory of projectiles?

Answer 4

Gravity and air resistance

Question 5

Without gravity, an object will travel ______ with ____ change in velocity

Answer 5

indefinitely with no change in velocity

Question 6

With gravity, motion pathway changes _____

Answer 6

vertically

Question 7

Without air resistance, you get a ______ shape trajectory

Answer 7

Parabola m(curved with an apex)

Question 8

With air resistance, it changes horizontal and vertical _____

Answer 8

velocity

Question 9

What 3 main factors influence the projectile trajectory?

Answer 9

1. Angle of projection
2. Speed of projection
3. Height of projection

Question 10

To maximise the range of projectile distance you need to increase the _____ and ______ _______

Answer 10

speed and release height

Question 11

If the height of release is the same as landing, the optimal release angle is ___

Answer 11

45 degrees

Question 12

If the height of release is above the landing, the optimal release angle is ..?

Answer 12

LESS than 45 degrees

Question 13

If the height of release is below the landing, the optimal release angle is ..?

Answer 13

GREATER than 45 degrees

Question 14

Ball thrown up with a larger horizontal angle will reach ___ _____ but ____ ____

Answer 14

more height but less distance

Question 15

length of arc is (equation)…

Answer 15

displacement (s) = radius (r) x angle θ

Question 16

____ = radius of rotation

Answer 16

r

Question 17

The distance of the point from the axis of rotation is the _____

Answer 17

radius

Question 18

____ = the curved path followed by the point

Answer 18

displacement (s)

Question 19

In displacement, the θ must be in _____

Answer 19

Radians

Question 20

______ is the product of the distance of the point from the axis of rotation and the angular velocity of the body

Answer 20

Velocity

Question 21

ω =

Answer 21

angular velocity

Question 22

VT is…

Answer 22

Tangential velocity

Question 23

The formula for tangential velocity (VT) is …?

Answer 23

VT = r ω

Question 24

angular velocity is defined by the _____ symbol

Answer 24

omega (ω)

Question 25

For a player to increase linear velocity of a ball in soccer, they can increase ____ _____ of legs and/or increase _____ of legs

Answer 25

increase angular velocity and/or increase length of legs (by straightening joint)

Question 26

Acceleration due to rotation of a segment can be resolved into 2 perpendicular components ….?

Answer 26

1) Tangential component

2) Radial component

Question 27

Acceleration = _____ / _____

Answer 27

Acc = Δvel / time

Question 28

Angular Acceleration = ______ / _____

Answer 28

Ang Acc = Δang vel / time

Question 29

How to find change in velocity ?

Answer 29

Vf - Vi

Question 30

Acceleration in the radial component is always directed to …?

Answer 30

Centre of gravity (COG)

Question 31

Radial acc is also known as _____ ______

Answer 31

centripetal acceleration

Question 32

Radial acc equation…?

Answer 32

aR = VT^2/ r (radius)

Question 33

Once the rotating body is released, the object will move in a curved or straight line?

Answer 33

straight line (no forces still acting on it