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Physics (old) > Motion > Flashcards

Motion Flashcards

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1
Q

Derive the two main SUVAT equations

A

Velocity time graph

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2
Q

Deduce all 5 SUVAT equations

A
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3
Q

How would you resolve a vector into two components?

A

Horizontal = “hypotenuse “ cos (θ)
Vertical = “hypotenuse “ sin (θ)

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4
Q

Resolving Vector Questions

A
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5
Q

Box slope question

A
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6
Q

What is the equation for average speed?

A
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7
Q

Describe distance

A

A magnitude of the vector displacement
Can be observed and measured

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8
Q

Describe Speed

A

A magnitude of velocity which can only be calculated
Every speed calculation = average speed calculation

Smaller the change in time, more accurately the average speed equates to instantaneous speed

(Instantaneous = tangent)

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9
Q

Describe velocity

A

The rate of change of displacement
Measured by an accelerometer

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10
Q

What is the area under an acceleration time graph?

A

Velocity

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11
Q

What is the equation for Newton’s second law?

A
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12
Q

What is the sign/notation for gradient?

A
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13
Q

What is the difference between and Non Uniform and Uniform acceleration?

A

Uniform : The speed changes at a constant rate, travelling in a straight line
Non Uniform : speed changes at varying rate OR direction changes (can only be found using gradient of graph)

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14
Q

Draw the acceleration time graph for a ball thrown in the air

A
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15
Q

Draw the velocity time graph for a ball throw in the air

A
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16
Q

Draw the displacement time graph for a ball thrown in the air

A
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17
Q

Describe the displacement time graph

A
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18
Q

What is the difference between the instantaneous velocity and average velocity measurements of a graph?

A
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19
Q
A

Draw a velocity time graph
450/s

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20
Q

write all 4 suvat equations

A
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21
Q

when can the suvat equations be used?

A

when acceleration is constant (9.81)

assumption: air resistance is neglible

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22
Q

what is the equation for stopping distance?

A

stopping distance= thinking distance + braking distance

23
Q

what factors affect the thinking distance and braking distance?

A

thinking distance:
* drinking/drugs
* tiredness
* distractions
* speed

braking distance:
* faulty brakes
* worn out tires
* speed

24
Q

how is thinking distance calculated, and describe the relationship between distance and time

A
25
Q

how is the braking distance calculated and what is the relationship between initial speed (u) and distance?

A
26
Q

Describe the practical to find acceleration

A
27
Q

What are some precautions that are taken for the practical?

A
  • preventing risk of electrocution : use a low current
  • to minimise risk to the surface use something to help the object land
  • clamp the stand to the desk to prevent falling
28
Q

Question:

A
29
Q

what happens when a ball is thrown vertically upwards from earth?

A
  • acceleration is constant throughout
  • the distance travlled upwards= the distance travlled down wards
  • the intial speed as ball leaves hand=final speed as thrower recieves
  • time taken to top of tragectory = time takento thrower catching the ball
30
Q

Question: What is the range of the cannon

A
31
Q

What is the total displacement of the arrow?

A

A:
* the horizontal velocity stays the same
* in the vertical velocity, at the maximum displacment- the veloicty is 0
* make sure you label the positive and negative direction of veocity as verically the direction changes
* the acceleration is always -9.81

32
Q
A
33
Q

If A has a greater velocity than B

A

They both reach the ground at the same time

34
Q

What two factors affect an object’s acceleration?

A

The force and the mass of an object.

35
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36
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37
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38
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39
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40
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41
Q
A

B-0.4

42
Q
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43
Q
A
44
Q

define thinking distance

A

the distance travelled between the driver seeing the damage and the brakes being applied

45
Q
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46
Q
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47
Q
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48
Q
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49
Q

What is the distance time graph for a ball being thrown up and falling back down?

A
50
Q
A
51
Q
A
52
Q

Explain the kinetic energy and velocity of the projectile at maximum height

A
53
Q

what is freefall?

A

when a body falls through a medium without any drag producing devices (parachutes)
* a= g

only has it’s own weight acting

Physics (old) (10 decks)

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