Linear Kinematics

Question 1

What is linear motion

Answer 1

It occurs when all points on a body/object move the same distance/direction/time

Question 2

What is linear motion also known as

Answer 2

Translation.

Question 3

What is rectilinear translation

Answer 3

When all points in the body move in a straight line

Question 4

What is motion

Answer 4

The action or process of a change in position

Question 5

What type of motion is skating?

Answer 5

Rectilinear motion

Question 6

What is displacement?

Answer 6

Displacement is 0 when you start and finish at the same position.

Eg. Run round 400m track.

However , displacement changes when you end in a different position.

Eg. Run 200m round a 400m track

Question 7

Equation for impulse is?

Answer 7

Force x time

Question 8

What is the Cartesian coordinate system for?

Answer 8

Provides a method of rendering graphs and indicating the positions of two points on a 2D surface or in a 3D space.

It’s used to define positions/origins

Question 9

What is trojectory?

Answer 9

Path where object starts and lands

Question 10

Identify the 3 mechanical factors of determining projectile motion

Answer 10

Speed
Height
Angle

Question 11

State one mechanical factor that maximises range in trajectory

Answer 11

Speed

Question 12

What landing Heigh is above 45

Answer 12

Negative

Question 13

What landing heigh is 0

Answer 13

Positive

Question 14

What’s a sporting example of negative landing height

Answer 14

Basketball throw

Question 15

What is the definition of kinetics

Answer 15

Branch of mechanics of which forces are concerned

Question 16

What is kinematics ?

Answer 16

Branch of mechanics concerned with motion of objects

Question 17

How do you increase release speed

Answer 17

Kinetics ( force N.s)

Eg. Impulse ( force N.s x time)

Question 18

What is force ?

Answer 18

Force = mass x acceleration

Question 19

What are the basic kinetic concepts

Answer 19

Inertia
Mass
Weight

Question 20

What is inertia

Answer 20

Resistance to change

Question 21

What’s an example of inertia

Answer 21

An ice skater spinning round sticking her arms out increasing her inertia and increases her resistance to change. So she slows down

However , if she tucked her arms in decreases her inertia resulting in her speeding up.

Question 22

What is weight?

Answer 22

The measure of force of gravity acting on the object

Question 23

What is mass

Answer 23

The quantity of matter in an object

Question 24

How many Newton’s in 1kg?

Answer 24

9.81 Newton’s

Question 25

What is momentum

Answer 25

Product of mass and velocity of a body

Question 26

What's the equation for momentum

Answer 26

Mass x velocity

Question 27

What's is momentum measured in

Answer 27

Kg.m/s

Question 28

What's impulse

Answer 28

Force x time

Question 29

What is impulse momentum relationship

Answer 29

So Impulse = force x time Momentum = mass x velocity So the change of momentum of a object is a result on an impulse being applied.

Question 30

What's a sporting example of impulse momentum relationship

Answer 30

Javelin throw Impulse= the arm is accelerated over a longer period of time Resulting in a increased release of velocity (momentum) Force x time (increases ) - mass x velocity (increases)

Question 31

What's Newton's first law

Answer 31

Inertia Acceleration , deceleration and change of direction can not happen unless force is applied

Question 32

What is Newton's 2nd law

Answer 32

Momentum A force applied causes an acceleration of a body which has a size proportion to the force and occurs in the same direction of force

Question 33

What's Newton's 3rd law

Answer 33

Reaction Every action has a reaction

Question 34

What is a moment

Answer 34

A moment is torque. | Torque = a turning effect produced by a force

Question 35

What's a unit of torque

Answer 35

Newton.s

Question 36

What is friction

Answer 36

Coefficient of friction x normal reaction force

Question 37

What's is static friction

Answer 37

When both forces are equal

Question 38

What's rolling friction

Answer 38

A wheel rolling on the wall

Question 39

What is sliding friction

Answer 39

Skiing

Question 40

What is Coefficient restitution

Answer 40

The elasticity of two objects in collisions. Eg. When a ball hits the wall

Question 41

How would you work out coefficient restitution of a ball being dropped

Answer 41

e= square root of height bounce / height drop e =coefficient restitution

Question 42

How to work out impact. Using a bat hitting a ball

Answer 42

EM = e x EM before.

Question 43

What are the factors affecting coefficient restitution

Answer 43

``` Temperature Impact velocity Characteristics of the floor Characteristics of the ball Height drop ```

Question 44

What is the equation for work

Answer 44

Work(J) =force x displacement How much work is done from point a-b

Question 45

What are the types of energy

Answer 45

Kinetic (motion) | Potential

Question 46

What are the two types of potential energy

Answer 46

Gravitational | Strain