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Higher Physics > Our Dynamic Universe > Flashcards

Our Dynamic Universe Flashcards

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1
Q

What does the S in SUVAT stand for?

A

Displacement

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2
Q

What does the U in SUVAT stand for?

A

Intinal velocity

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3
Q

What does the V in SUVAT stand for?

A

Final velocity

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4
Q

What does the A in SUVAT stand for?

A

Acceleration

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5
Q

What does the T in SUVAT stand for?

A

Time

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6
Q

How do you calculate weight down a slope?

A

Weight-parallel=mgsin0

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7
Q

How do you work out a horizontal component?

A

Horizontal=resultant×cos0

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8
Q

How do you calculate a vertical component?

A

Vertical=resultant×sin0

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9
Q

When a lift is Stationary what is the apparent weight equal to?

A

Actual weight

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10
Q

When a lift is moving at a Stationary speed what is apparent weight equal to?

A

Actual weight

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11
Q

When a lift is accelerating up what is apparent weight equal to?

A

Actual weight +fun

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12
Q

When a lift is decelerating down what is apparent weight equal to?

A

Actual weight + fun

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13
Q

When a lift is decelerating up what is apparent weight equal to?

A

Actual weight - fun

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14
Q

When a lift is accelerating down its apparent weight is equal to?

A

Actually weight - fun

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15
Q

What happens to your weight in a lift when the lift is in free fall?

A

Weightlessness

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16
Q

What is the law of conservation of momentum?

A

The total momentum before a collision equals the total momentum after a collision in the absence of external forces.

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17
Q

How do you work out if a collion is elastic?

A

Calculate kinetic energy before and after a collision. If it is equal then the collision is elastic. If it isn’t equal then it is inelastic.

18
Q

What is impulse equal to?

A

Change in momentum
Contact force × contact time
Area under a force time graph

19
Q

Is horizontal velocity constant?

A

Yes

20
Q

Is vertical velocity constant?

A

No

21
Q

What is the vertical velocity at max height?

A

Zero

22
Q

Is the speed of light constant in all frames of reference?

A

Yes

23
Q

Name scalar quantity?

A 
Distance
Speed
Time
Mass
Energy
24
Q

Name vector quantities

A 
Displacement
Velocity
Acceleration
Momentum
Force
25
Q

What does a straight line on a displacement time graph indicate?

A

Constant velocity

26
Q

What is the gradient of a displacement time graph equal to?

A

Velocity

27
Q

What is equal to the area under a velocity time Graph?

A

Displacement

28
Q

What is the gradient of a velocity time Graph equal to?

A

Acceleration

29
Q

What is newton’s first law?

A

An object will remain at rest, or will continue to move in a straight line at a constant speed, unless acted upon by an unbalanced force.

30
Q

What is newton’s second law?

A

A uniform unbalanced force will produce a uniform acceleration.

31
Q

What does conservation of energy state?

A

Energy cannot be created or destroyed, only transformed from one form into another.

32
Q

Can energy be created?

A

No

33
Q

Can energy be destroyed?

A

No

34
Q

Can energy be transferred from one from to another?

A

Yes

35
Q

What is the law of conservation of linear momentum?

A

The total momentum before a collision is equal to the total momentum after a collision in the absence of external forces.

36
Q

What is the total momentum before a collision equal to?

A

The total momentum after (in the absence of external forces)

37
Q

What is the total momentum after a collision equal to?

A

The total momentum before a collision (in the absence of external forces)

38
Q

What is the area under a force time graph equal to?

A

Impulse

39
Q

What is impulse?

A

Change in momentum

40
Q

How old is the universe?

A

13.8 billion years old

Higher Physics (4 decks)

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