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Year 10 MMS > Motion - Overall Study > Flashcards

Motion - Overall Study Flashcards

1
Q

Define velocity

A

Change in displacement divided by change in time

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2
Q

What is the equation for acceleration?

A

Acceleration = change in speed/time taken

= v2-v1/t

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3
Q

Name an action-reaction pair

A

Gravity normal force
Pushing against a wall wall pushing back
Other examples can be added

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4
Q

At what rate does Earth pull objects to its centre due to gravity?

A

9.8m/s^2

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5
Q

What equation can you generally use to calculate weight?

A

F=mg
F=Force (gravity)
m=mass
g=acceleration due to gravity

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6
Q

What two things determine weight?

A

Mass and gravity

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7
Q

What three statements can be created from F=ma

A
  1. The more massive the object, the greater the force needed to accelerate it
  2. The greater the force applied, the quicker it will accelerate
  3. If the same force is applied to a more massive object, the acceleration will be less.
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8
Q

How else can Newton’s second law of motion be written?

A

F=ma

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9
Q

Say someone is not wearing a seatbelt in a head-on collision, what is likely to occur?

A

They will likely fly through the front window of a car/vehicle

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10
Q

Where is a common place where inertia is felt?

A

Car, bus, plane, vehicle, rollercoaster etc.

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11
Q

What is another term for Newton’s first law of motion?

A

Inertia

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12
Q

Can the distance travelled from a speed-time graph be calculated? If so, how?

A

Yes. By finding the area under the speed-time graph

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13
Q

What does a speed-time graph show?

A

The speed of a travelling object as time pases

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14
Q

What does a displacement-time graph show?

A

How far an object moves from its starting point over a period of time.

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15
Q

How do you calculate the gradient within a graph?

A

Rise/run

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16
Q

What does a distance-time graph show?

A

How far an object moves as time progresses

17
Q

TRUE or FALSE

The acceleration of something can be a negative number.

A

True

18
Q

What is the equation for average speed?

A

Speed (m/s or km/h) = distance travelled/time taken

v = d/t

19
Q

What is the equation for average velocity?

A

Average velocity = displacement/time taken

–>v = –>d/t

20
Q

How many seconds are in 1 hour?

A

3600

21
Q

What are the SI Units for:

  1. Length
  2. Time
  3. Mass
A
  1. meters
  2. seconds
  3. kilograms
22
Q

Define Newton’s third law of motion.

A

For every action, there is an equal and opposite reaction

23
Q

Define weight

A

your mum

The weight of an object is the force of gravity on the object and is defined as the mass times acceleration of gravity: w=mg

24
Q

Define mass

A

Mass is the quantity of matter in a body regardless of its volume or any of the forces acting upon it.

25
Q

Define Newton’s second law of motion.

A

An object acted upon by a force experiences acceleration in the same direction and proportional to the magnitude of the net force, and inversely proportional to the mass of the object.

F=ma

26
Q

Define net force

A

The sum of all the forces acting on an object

27
Q

Define force

A

Any interaction that, when unopposed, will change the motion of an object

28
Q

Define inertia

A

A property of matter that keeps something in the same position or moving in the same direction unless acted upon by an external force.

29
Q

Define Newton’s first law of motion.

A

an object will remain at rest or in uniform motion in a same direction unless acted upon by an external force

30
Q

Define origin

A

The point at which the axes of a coordinate system intersect

31
Q

Define gradient

A

The gradient of the graph is the rise over the run

32
Q

Define constant speed

A

When an object is travelling at the same speed and is not accelerating or decelerating.

33
Q

Define deceleration

A

When an object is slowing down

34
Q

Define acceleration

A

An object has acceleration when its velocity changes. Average acceleration equals change in velocity divided by the time taken. The most common unit is m/s

35
Q

Define instantaneous speed.

A

The speed at any particular instant

36
Q

Define average speed

A

Change in distance divided by change in time; usually measured in km/h or m/s

37
Q

Define speed

A

Change in distance divided by time

38
Q

Define displacement

A

How far you are from where you started and what direction you are from where you started

39
Q

Define distance

A

Total distance travelled

Year 10 MMS (6 decks)

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