Yr 10 - Physics

Question 1

Name contact forces.

Answer 1

Friction, air and water resistant, thrust

Question 2

Name non-contact forces:

Answer 2

Gravitational, magnetic, electrostatic

Question 3

What is the SI unit of force

Answer 3

newton (N)

Question 4

What is the effect of balanced and unbalenced forces.

Answer 4

Balanced is when the resultant force is 0 because all forces are equal. Unbalanced force is when the resultant force is bigger or smaller than 0.

Question 5

What is the resultant force.

Answer 5

Sum of all the forces that act on the object.

Question 6

Define friction.

Answer 6

The resistance an object encounters when moving on the surface of another.

Question 7

Why does friction cause heat.

Answer 7

Because friction is caused by movement of atoms and the faster movement means more heat generated.

Question 8

What axis is the independent var?

Answer 8

X

Question 9

What axis is the dependent var?

Answer 9

Y

Question 10

Define speed.

Answer 10

The rate of change of distance covered in a given time

Question 11

Define acceleration.

Answer 11

Rate of change of speed on a given body over time

Question 12

Unit speed.

Answer 12

m/s

Question 13

Unit acceleration.

Answer 13

m/s²

Question 14

How to calculate force.

Answer 14

F = MA (force = mass * accelaration)

Question 15

Define mass.

Answer 15

Is the amount of matter an object has

Question 16

Unit of mass

Answer 16

kg

Question 17

Define weight

Answer 17

Is the amount of gravitational force acting on an object

Question 18

Unit of weight

Answer 18

newtons (N)

Question 19

On the moon what would be different

Answer 19

your weight - depends on gravity

Question 20

What is gravity

Answer 20

10 N/kg

Question 21

How is m/s² related to N/kg?

Answer 21

They are the same thing

Question 22

Define velocity.

Answer 22

Combination of speed and direction.

Question 23

Unit of velocity.

Answer 23

m/s

Question 24

Example of velocity and acceleration.

Answer 24

V = North at 5m/s.
A = 5m/s².

Question 25

How calculate final velocity

Answer 25

Vf = Vi + a * t

Vf: final velocity
Vi: initial velocity
a: acceleration
t: time

Question 26

Define terminal velocity

Answer 26

The constant speed attained by a body under the force of gravity when the resultant force is 0

Question 27

How to calculate weight

Answer 27

W = M*G

Question 28

What is delta V and how to calculate.

Answer 28

Change in Velocity and its Vf - Vi

Question 29

How to calculate velocity.

Answer 29

V = A*T

Question 30

How to calculate distance

Answer 30

D = S*T

Question 31

What’s on the x-axis?

Answer 31

Independent

Question 32

What’s on the y-axis?

Answer 32

Dependant

Question 33

How to calculate diagonal force.

Answer 33

Pythagoras horizontal and vertical.

Question 34

How does speed relate to drag?

Answer 34

Drag is the friction force created by air resistance. As speed increases so does drag. Eventually the forces become balanced and drag equals thrust. This means the speed is constant and the resultant force = 0.

Question 35

how to decrease friction?

Answer 35

Make the object aerodynamic to reduce drag because it would break through air particles easier. Make smoother surface because less interaction of molocules. Less mass to help F = MA.

Question 36

Gravity on moon.

Answer 36

1.6N

Question 37

How to calculate distance in speed time graph?

Answer 37

Calculate area and divide by two.

Question 38

Define force

Answer 38

a push or pull acting on an object

Question 39

What axis is speed on

Answer 39

y

Question 40

What axis is time on

Answer 40

x

Question 41

What axis is distance on

Answer 41

y