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GCSE 🏋🏾‍♂️ > Physics P8 9 And 10 > Flashcards

Physics P8 9 And 10 Flashcards

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1
Q

What is a vector ?

A

A vector is a quantity that has size and direction .

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2
Q

What is a scalar quantity ?

A

A scalar quantity has size but no direction

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3
Q

What are 5 examples of scalar quantities ?

A

Mass , power , energy , time and speed .

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4
Q

What are 5 examples of vector quantities ?

A

Displacement , velocity , force , weight and acceleration .

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5
Q

What does displacement mean ?

A

A measure of how far an object moves in a given direction .

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6
Q

What is acceleration ?

A

The rate of change in velocity

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7
Q

What is speed ?

A

The measurement in the increase of distance .

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8
Q

What is velocity ?

A

It is the speed of a given direction

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9
Q

What is mass ?

A

The amount of an object that is present .

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10
Q

What is weight ?

A

The force acting on an object due to gravity

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11
Q

What is a force ?

A

A force is a push or pull on an object with direction .

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12
Q

What is energy ?

A

Energy is the amount of work done without a direction .

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13
Q

What is power ?

A

The ability to do work with speed .

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14
Q

How can a vector be shown on paper ?

A

An arrow showing the direction the vector is going towards in . The size of the vector can also be shown by the size of the arrow .

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15
Q

What are 4 examples of a contact force ?

A

Air resistance
Friction
Stretching
Tension

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16
Q

What is the difference between a contact force and a non contact force ?

A

A contact force is physically touching an object to make it move . Whereas non contact forces do not require the objects to be toucning .

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17
Q

What is newtons third law of motion ?

A

When two objects interact with one another , they both exert equal and opposite force on each other.

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18
Q

What is friction ?

A

Friction is the force exerted by a surface against an object when it moves across it .

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19
Q

What is a resultant force ?

A

A resultant force is the the combined effect of multiple forces acting on a single object .

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20
Q

What happens when a resultant force is zero ?

A

The forces acting on the object are balanced

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21
Q

How can resultant forces be shown ?

A

In a free body diagram

22
Q

What is the centre of mass of an object ?

A

The centre of mass of an object can be thought of as the point at which its mass can be thought of as being concentrated .

23
Q

How can the centre of mass of a regular object be found ?

A

By drawing lines and where they meet is the centre of mass

24
Q

What are the four steps in finding the centre of mass in an irregular object ?

A
  1. Make sure you have a retort stand , a cork pin and a plumb line .
  2. Then you find two points of an object or shape , then let the plumb line hang from one point and draw a line along it .
  3. Next hang the plumb line at the second point and draw a second line along it .
  4. The centre of mass will be the point at which those two lines cross .
25
Q

How do you calculate speed ?

A

Distance divided by time

26
Q

What happens when you start increasing or decreasing velocity ?

A

Your accelerating or decelerating

27
Q

What is the formula for acceleration ?

A

Final velocity - initial velocity divided by 2 x time

28
Q

What is the formula for velocity ?

A

Change in velocity divided by change in time .

29
Q

What is the formula for force ?

A

Force = mass x acceleration

30
Q

What is newtons second law ?

A

When you increase the force on an object you will increase the acceleration applied on to it .

31
Q

What does newtons third law depend on ?

A

The mass of the object

32
Q

What is the units for mass ?

A

Kg

33
Q

What is the unit for weight ?

A

Newtons

34
Q

What is the formula for weight ?

A

Weight = mass x gravitational field strength

35
Q

What is terminal velocity ?

A

Constant velocity

36
Q

What is the equation for total stopping distance ?

A

Total stopping distance = Thinking distance + braking distance

37
Q

What is the stopping distance ?

A

The distance it takes for the vehicle to stop

38
Q

What is the thinking distance ?

A

The thinking distance is the distance travelled between the driver realising he needs to brake and actually braking.

39
Q

What are three examples of what could effect the braking distance of a vehicle ?

A

The conditions of the road , the brakes and the tires

40
Q

What is the equation for deceleration ?

A

Final velocity squared - initial velocity squared divided by 2 x distance

41
Q

What is the equation for braking force ?

A

Mass x acceleration

42
Q

A car of mass 1000kg moving at 25 m/s in a distance of 75 metres . Calculate the deceleration of the car and the braking force .

A

0 squared - 25 squared divided by 2 x 75 = - 4.16 m/s squared = deceleration
1000kg x -4.16 m/s squared = -4.166N

43
Q

What is the equation for momentum ?

A

Velocity x mass

44
Q

What is momentum ?

A

Momentum is the measure of how much motion an object has .

45
Q

What is an elastic object ?

A

An elastic object is one which regains its shape when a force deforms it.

46
Q

Where does the energy that causes an elastic object to deform go ?

A

It is stored as elastic potential energy

47
Q

What is tension ?

A

This when a force pulls on the object .

48
Q

What does it mean if something is proportional ?

A

The same size and amount to something else for example as one variable increases another , another variable will increase at the same rate .

49
Q

What is hookes law ?

A

The extension of a spring is directly proportional to the force applied .

50
Q

What is the equation for the force applied on an object ?

A

Springs constant x extension

GCSE 🏋🏾‍♂️ (13 decks)

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