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physics > motion > Flashcards

motion Flashcards

(54 cards)

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1
Q

What is a scalar

A

Measures only size

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2
Q

What is a vector

A

Measures both size and direction

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3
Q

What is distance

A

Is how far something is

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4
Q

Is distance a scalar or vector quantity

A

Scalar

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5
Q

What is displacement

A

Is how far something is from a particular point

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6
Q

Is displacement scalar or vector quantity

A

Vector

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7
Q

What is speed

A

How fast something is

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8
Q

Is speed a scalar or vector

A

Scalar

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9
Q

What is velocity

A

How fast something is in a given direction

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10
Q

Is velocity scalar or vector

A

Vector

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11
Q

What are the five vector quantities

A

Force ,acceleration,displacement,momentum,velocity

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12
Q

What is the equation for distance

A

Distance = speed divided by time

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13
Q

what is the equation for acceleration

A

a= v-u/t

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14
Q

what is acceleration measured in

A

m/s squared

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15
Q

what is the second equation for acceleration including distnace

A

v2-u2 = 2xaxd

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16
Q

What does v stand for in the second equation for acceleration

A

end velocity

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17
Q

what does the u stand for in the second equation for acceleration

A

Start velocity

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18
Q

what is the equation for force

A

force = mass x acceleration

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19
Q

What is force measured

A

newtons

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20
Q

wat is mass measured in

A

kg

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21
Q

what is the equation for weight

A

weight = mass x gravitational field strength

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22
Q

What is weight measured in

23
Q

why is weight measured in newtons

Study These Flashcards
A

because weight is a force

24
Q

what is gravitational field strength measured in

25
what is the equation for momentum
momentum =mass x velocity
26
what is momentum measured in
kgm/s
27
what is terminal velocity
wherethe ball is travelling at a constant speed
28
what is the law of conservation of momentum
The momentum before the collision =the momentum after the collision
29
What is a closed system
is where no external forces act on it
30
what is the crumple zone
if you crash into a car the car will crumple reducing the impact
31
In a distance speed time,what does a horizontal line mean
stationary
32
in a distance speed time graph ,a line on a slope mean
steady speed
33
in a distance speed time graph , what does a curved line mean
acceleration
34
what is deceleration
speeding down
35
what is the equation for a stopping distance
stopping distace = thinking distance + breaking distance
36
what four factors effect reaction time
tiredness,distrractions,alchol consumption,drugs
37
What is the average persons reaction time
0.7s
38
name three non contact forces
weight,electrostatic force,and magnetic
39
what is newtons first law
Newton’s first law states that if the result force acting upon an object is zero its acceleration is zero
40
what is the centripetal force
the force that goes towards the centre of the spinning object ,the bigger the circle then the smaller the force
41
what is netwon's second law
the acceleration of an object is directly proportional to the resultant force in the same direction as the force ( and inversely proportional to the mass of object). f=ma
42
What is Newton’s third law
For every reaction there is an equal and opposite action
43
Why is the unit for acceleration for meters second squared
because the unit for change in velocity is meters per second and the unit for time is seconds so when you divide meters per seconds by seconds ,you get meters per second squared .
44
What is 1 hour in seconds
3600s
45
How many meters r in a mile
1600 meters
46
In a velocity time graph. What does a horizontal line mean
Constant speed
47
In a velocity time graph, the area under the graph respresents …
Distance travelled
48
In a resultant force, when the arrow are pointing in different directions what does it mean
Bigger force- smaller force
49
In a resultant force , when the arrows r moving in the same directions
Bigger force + smaller force
50
WHat is thrust
It is the force that move things forward
51
What is friction
The force that occurs between two objects rubbing together
52
What is the equation for change of momentum
Final mass - initial mass
53
What is the second force equation
Final mass - initial mass / time
54
What is the third force equation
Change in momentum/ time

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