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Physics > Y10 > Flashcards

Y10 Flashcards

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1
Q

How to work out force?

A

Mass in kg x acceleration in m/s

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2
Q

How to work out velocity?

A

Distance dived by time

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3
Q

How to work out wave speed?

A

Frequency in Hz x wavelength in meters

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4
Q

What is Newton’s third law?

A

If object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back in object A

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5
Q

What do forces always come in?

A

Pairs

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6
Q

What is the name of the force that pulls humans down to the ground?

A

Gravity

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7
Q

What is the force that pushes against gravity?

A

Air resistance

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8
Q

How to calculate momentum?

A

Mass in Kg x velocity in m/s

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9
Q

What does momentum depend on?

A

Mass

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10
Q

Why does a lorry have a higher momentum then a car at the same speed?

A

More mass

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11
Q

What is the momentum of a wrecking ball at 500kg and moving at 10m/s

A

5000 kg m/s

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12
Q

How to calculate force?

A

mass x acceleration

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13
Q

How to calculate force?

A

Mass x change in velocity dived by time

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14
Q

How to calculate change in momentum?

A

Mass x change in velocity

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15
Q

What factors effect stopping time?

A

Mass of vehicle
Speed of the vehicle
Driver reaction time
State of vehicles breaks
State of road
Friction between tyre and road surface

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16
Q

What are transverse waves?

A

Particles move up and down as the wave passes

17
Q

What are longitudinal waves?

A

Move back and forward compared to as the wave passes

18
Q

Examples of transverse waves?

A

Water waves

19
Q

2 ways to calculate wave speed using waves?

A

Frequency (Hz) x wavelength (metres)
Distance (metres) dived by time (seconds)

20
Q

When light travels from air to glass it bends…

A

Away from the normal

21
Q

When light travels from glass to air it bends…

A

Towards the normal

22
Q

Increasing the wavelength of an electromagnetic wave decreases it…

A

Frequency

23
Q

What was JJ Thompson idea of the atom

A

Negatively charge electrons spread around a positive charge e.g plum pudding

24
Q

What is Rutherford idea of the atom?

A

The is a positively charged nucleus that is most of the mass of the atom
Most of the atom is empty space
The negatively charged electrons are in the empty space

25
Q

What is the atomic number?

A

The amount of protons and electrons in the element

26
Q

How to calculate the number of neutrons?

A

Atomic mass-atomic number(protons and electrons)

27
Q

Examples of longitudinal waves?

A

Sound

Physics (2 decks)

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