Motion

Question 1

Linear motion

Answer 1

Motion in a straight or curved path where all body parts move in the same direction at the same speed

Question 2

Distance vs displacement

Answer 2

Distance is the measure of the path travelled from start to finish
Displacement is the difference between the initial position and the final position of an object

Question 3

Speed vs velocity

Answer 3

speed is the ratio of distance covered to the time taken

velocity is the ratio of displacement to the time taken

Question 4

Acceleration

Answer 4

Acceleration is the change in velocity across a period of time

Question 5

Angular motion

Answer 5

movement around an axis

Question 6

Axis

Answer 6

Central or fixed point where the rotation occurs around. this could be an imaginary point like the body’s centre of gravity or a real point like a bar

Question 7

Eccentric force

Answer 7

a force applied away from an object’s centre of gravity. When these forces are applied, the object will experience angular motion

Question 8

Torque

Answer 8

The turning effect caused by eccentric forces. The amount of torque is dependent on the amount of eccentric force applied and how far away from the center it is applied

Question 9

Torque formula

Answer 9

eccentric force x moment arm

Question 10

Angular distance

Answer 10

the sum of all the angular changes the body undergoes.

Question 11

Angular displacement

Answer 11

the difference between the initial and final angular position of an object

Question 12

Angular speed

Answer 12

the angular distance covered divided by the time taken

Question 13

Angular velocity

Answer 13

The angular displacement divided by the time taken

Question 14

Projectile motion

Answer 14

The movement of an object through air. It is automatically under the influence of air resistance and gravity.

Question 15

Vertical component

Answer 15

gravity is a force working against the vertical motion and relates to the height reached by a projectile

Question 16

Horizontal component

Answer 16

Air resistance is a force working against the horizontal motion and relates to the horizontal distance covered by the projectile. Factors that impact the amount of air resistance are mass, shape, surface area and nature of surface area

Question 17

speed of release

Answer 17

The greater the speed of release, the higher and further the projectile will travel

Question 18

Angle of release

Answer 18

The angle at which the object is released into the air. To achieve maximal horizontal distance, the optimal angle of release is 45. If height of release is lower than the landing height, angle of release should be higher.

Question 19

Height of release

Answer 19

The height from which the projectile is released affects how far it travels. Increasing the height of release will generally maximise horizontal distance.