P8

Question 1

Displacement

Answer 1

Distance without a change in direction

Question 2

Vector

Answer 2

Physical quantities with magnitude and direction.

Question 3

Scalar

Answer 3

Physical quantities with magnitude but no direction.

Question 4

Vector Examples

Answer 4

Acceleration,
Force,
Weight,
Velocity,
Displacement.

Question 5

Scalar Examples

Answer 5

Mass,
Speed,
Time,
Distance,
Energy,
Power.

Question 6

Contact Force Examples

Answer 6

Friction,
Air Resistance,
Tension,
Thrust.

Question 7

Non-Contact Force Examples

Answer 7

Magnetic,
Electrostatic,
Gravitational,
Nuclear.

Question 8

What is Newton’s Third Law?

Answer 8

When two objects interact with eachother, they exert equal and opposite forces on eachother.

Question 9

Friction

Answer 9

Force exerted by a surface against an object when it moves across it.

Question 10

Resultant Force

Answer 10

When multiple forces act on an object, the resultant force is a singular force that has the same effect.

Question 11

Balanced Force

Answer 11

If the resultant force acting on an object is 0, all the forces are said to be balanced.

Question 12

Unbalanced Force

Answer 12

If the resultant force acting on an object is 0, then the force is unbalanced.

Question 13

Center Of Mass

Answer 13

The point at which an object’s mass can be thought of as being concentrated.

Question 14

How to find the center of mass of an IRREGULAR object?

Answer 14

Suspend the shape,
Attach a plumb line down the center,
Draw a line down the plumb line,
Repeat that from a different point,
The Center of Mass is where they cross.

Question 15

Why do cars topple over at certain points?

Answer 15

Center of mass is outside of the wheelbase, therefore a resultant moment is produced, toppling the car.

Question 16

How to make cars more stable?

Answer 16

Give them a wider wheelbase and make the center of mass lower.

Question 17

Valid

Answer 17

Results which are reproducible, repeatable and answer the original question.

Question 18

Repeatable

Answer 18

Same person does an experimeng again using the same method and same equipment, they will get similar results.

Question 19

Reproducible

Answer 19

Another person does an experiment again or a differemnt method or equipment is used, they will get similar results.

Question 20

Data which is repeatbel amd reproducible

Answer 20

Reliable

Question 21

Results which are very close to the true value

Answer 21

Acurate

Question 22

Results which are really close to the true value

Answer 22

Precise

Question 23

Resolution

Answer 23

Smallest measurable value above 0.

Question 24

Range

Answer 24

Difference between the highest and lowest values.

Question 25

Uncertainty

Answer 25

Range / 2 (+-)

Question 26

Random Error

Answer 26

An error usually due to the person doing the experiment

Question 27

Systematic Error

Answer 27

An error due to the system or apparatus being used.