P5

Question 1

Vectors

Answer 1

Quantities that have direction and magnitude

Question 2

Scalars

Answer 2

Quantities that only have a magnitude

Question 3

Vector examples

Answer 3

Force, velocity, displacement, acceleration, momentum

Question 4

Scalar examples

Answer 4

speed,distance, mass, temperature, time

Question 5

Contact forces

Answer 5

A force that requires 2 objects to be touching

Question 6

Non-contact forces

Answer 6

A force that does not require 2 objects to be touching

Question 7

Contact force examples

Answer 7

Friction, air resistance, tension

Question 8

non contact force examples

Answer 8

magnetism, gravity, electrostatic forces

Question 9

Weight

Answer 9

The force acting on an object due to the gravity

Question 10

Mass

Answer 10

The amount of ‘stuff’ in an object

Question 11

Weight equation

Answer 11

Weight(N)=Mass(kg) x gravitational field strength(N/kg)

Question 12

Earths gravitational field strength

Answer 12

9.8N/kg

Question 13

Resultant force

Answer 13

The overall force on a point or object

Question 14

Extension equation

Answer 14

Force(N) = spring constant(N/m) x Extension(m)

Question 15

Moment equation

Answer 15

Moment(Nm) = Force (N) x Distance (m)

Question 16

Moment

Answer 16

The turning effect of a force

Question 17

Pressure equation.

Answer 17

Pressure (Pa) = Force (N) /area (m)

Question 18

Pressure of a liquid equation

Answer 18

Pressure (Pa) = Height (m) x Density (kg/m) x Field strength(N/kg)

Question 19

Upthrust

Answer 19

Force of an object. If it is equal to the objects weight, it will float. If the upthrust is less than the weight, it will sink

Question 20

Floating

Answer 20

Depends on the density of the solid compared to the density of the liquid

Question 21

Atmospheric pressure

Answer 21

Created on a surface by air molecules. Decreases with height

Question 22

Distance

Answer 22

How far an object has moved. It is a scalar quantity.

Question 23

Displacement

Answer 23

Vector quantity. Measures distance and direction in a straight line from A to B

Question 24

Walking speed

Answer 24

1.5m/s

Question 25

Running speed

Answer 25

3m/s

Question 26

Cycling speed

Answer 26

6m/s

Question 27

Car speed

Answer 27

25m/s

Question 28

Train speed

Answer 28

55m/s

Question 29

Plane speed

Answer 29

250m/s

Question 30

Acceleration equation

Answer 30

Acceleration(m/s) = change in velocity (m/s) / time(s)

Question 31

Distance time graph gradient

Answer 31

tells you the speed

Question 32

Velocity time graph gradient

Answer 32

tells you the acceleration

Question 33

Friction

Answer 33

Force between 2 surfaces in contact. Acts in the opposite direction to movement.

Question 34

Drag

Answer 34

Resistance in air or fluid

Question 35

Terminal velocity

Answer 35

Fastest speed that an object can travel

Question 36

Newton’s first law

Answer 36

If the resultant force on a stationary object is 0. The object will remain stationary

Question 37

Newton’s second law

Answer 37

Acceleration is proportional to the resultant force

Question 38

Resultant force equation

Answer 38

Resultant force(N) = Mass (kg) x acceleration(m/s)

Question 39

Newtons 3rd law

Answer 39

When two objects interact, the forces they exert on each other are equal and opposite

Question 40

Inertia

Answer 40

The tendency for the motion to remain unchanged

Question 41

Stopping distance equation

Answer 41

Stopping distance = thinking distance + braking distance

Question 42

Thinking distance factors

Answer 42

Speed, reaction time, alcohol, drugs

Question 43

Breaking distance factors

Answer 43

Speed, weather, tyre condition, brake quality

Question 44

Momentum equation

Answer 44

Momentum(kg/m/s) = mass(kg) x velocity (m/s)

Question 45

Momentum

Answer 45

How much oomph an object has. In a close system it is always conserved.

Question 46

Change in momentum equation

Answer 46

Force(N) = Change in momentum(kg m/s) / change in time(s)