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Physics A-Level > Topic 3 Kinematics > Flashcards

Topic 3 Kinematics Flashcards

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1
Q

What are scalar quantities.

A

They only have magnitude

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2
Q

What are vector quantities?

A

They both have magnitude and direction.

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3
Q

What is the formula for velocity?

A

Change in displacement/time
V = /\s / /\t

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4
Q

What is the formula of acceleration?

A

Change in velocity/time
a = /\v / /\t

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5
Q

What are the three types of graph that can represent motion?

A

Displacement-time graphs, velocity-time graphs and acceleration-time graphs

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6
Q

What does the y-intercept represent in a displacement-time graph?

A

It equals the initial displacement

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7
Q

What does a diagonal straight line represent on a displacement-time graph?

A

This represents constant velocity

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8
Q

What does a positive slope represent in a displacement-time graph?

A

It represents motion in the positive direction

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9
Q

What does a curved line represent in a displacement-time graph?

A

It represents acceleration

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10
Q

What does a straight line represent in a displacement-time graph?

A

A horizontal line represents a state of rest

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11
Q

What is the difference between a distance-time graph and a displacement-time graph?

A

A displacement-time graph can have a positive or negative value but a distance-time graph.

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12
Q

What does a slope represent in a velocity-time graph

A

Slope represents acceleration

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13
Q

What does the y-intercept represent in a velocity-time graph

A

The y-intercept equals the initial

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14
Q

What does a straight line represent in a velocity-time graph

A

It represents uniform acceleration

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15
Q

What does a positive slope represent in a velocity-time graph

A

An increase in velocity (acceleration) in the positive direction.

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16
Q

What does a curved line represent in a velocity-time graph

A

It represents the non-uniform acceleration.

17
Q

What does a horizontal line (zero slope) represent in a velocity-time graph

A

It represents motion with constant velocity

18
Q

What does a the area under the curve represent in a velocity-time graph

A

It equals the displacement or distance travelled

19
Q

Difference between a velocity-time graph or speed-time graph

A

The velocity-time graph can have a positive or negative values on the displacement axis. However, a speed-time graph only has positive.

20
Q

What does the y-intercept represent in an acceleration-time graph

A

It equals the initial acceleration

21
Q

What does a horizontal line (zero slope) represent in an acceleration-time graph?

A

An object undergoing constant acceleration.

22
Q

What does the area under the curve equal in an acceleration graph

A

It equals the change in velocity

23
Q

What does the velocity equal in a displacement-time graph?

A

The gradient of a displacement-time graph

24
Q

For a bouncing ball, when does the velocity change?

A

Since it changes direction at the highest and lowest point, the velocity changes.

25
Q

What are the 4 us at equations?

A

V=u+at
S=ut+1/2at^2
S=(v+u)/2 x t
v^2 = u^2 +2as

26
Q

What does start in rest mean in a question?

A

It means that u=0 and t=0 if both are not mentioned in the question

27
Q

What does the acceleration of free fall mean?

A

The acceleration of free fall ,g, is defined as the acceleration of any object in response to the gravitational attraction between the Earth and the object.

28
Q

What is the stopping distance of a car?

A

The distance it travels in the time it takes to stop in response to an emergency.

29
Q

What is the equation of stopping distance?

A

Thinking distance + braking distance

30
Q

The thinking distance is proportional to the s

A

Speed

31
Q

Thinking distance definition

A

The distance travelled by the vehicle from when the driver sees a problem and the brakes are applied.

32
Q

Thinking distance formula

A

Thinking distance = initial speed x reaction time

33
Q

Factors that affect thinking distance

A
  • The initial speed of the vehicle
  • Intoxication
  • Distractions (mobile phones)
  • Tiredness
34
Q

Braking distance defined as

A

The distance travelled by the vehicle after the driver has applied the brake

35
Q

Work done formula with braking distance

A

Work done = braking force x braking distance
= 1/2 mv^2 kinetic energy equation

36
Q

Factors that affect braking distance

A
  • The initial speed of the vehicle
  • Mass of the vehicle
  • Poor road conditions
  • Poor car conditions
37
Q

What components do projectile motion have?

A

A horizontal and vertical component

38
Q

Time of flight def

A

How long the projectile is in the air

39
Q

Maximum height attained def

A

The height at which the projectile is momentarily at rest.

Physics A-Level (10 decks)

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