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physics > year 10- energy & matter (core questions) > Flashcards

year 10- energy & matter (core questions) Flashcards

1
Q

What is an elastic object?

A

Something that returns to its original shape & size after stretching

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2
Q

What is the name of the energy store in a

stretched spring?

A

Elastic potential energy

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3
Q

What is the energy transfer when an arrow is

released from a bow?

A

Elastic potential energy store to kinetic energy store (KE)

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4
Q

What are the energy transfers when an arrow is

launched from a bow straight up

A

Elastic potential energy store to kinetic energy store to gravitational potential energy store

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5
Q

Why isn’t 100% of KE transferred to GPE when

an object is thrown upwards?

A

Energy is lost from KE when work is done against air resistance

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6
Q

Why isn’t 100% of EPE transferred to KE when

an arrow launched from a bow?

A

Energy is lost from EPE when energy is transferred to the thermal store

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7
Q

What is work done on an object?

A

Energy transferred to move the object

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8
Q

What is the unit of work?

A

joules (J)

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9
Q

Work done overcoming friction is mainly

transferred to which energy store?

A

Thermal store

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10
Q

What is the name of the force that opposes

motion of two surfaces in contact?

A

Friction

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11
Q

What is pressure?

A

Force per unit area

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12
Q

What is the formula for pressure in words?

A

Pressure = Force / area

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13
Q

What is the equation for pressure in symbols?

A

P = F /A

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14
Q

What is the unit of pressure?

A

Pascal (Pa)

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15
Q

What is one Pascal of pressure equal to?

A

1 Newton per metre squared

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16
Q

Describe the motion of particles in a gas?

A

Range of high speeds in random directions

17
Q

What does each gas particle do to the walls of

its container?

A

It collides with them

18
Q

What does the wall of a container feel when a

gas particle collides with it?

A

A tiny force

19
Q

What causes the gas pressure on a container?

A

Total force from all the collisions of the gas particles with the container walls

20
Q

What happens to the speed of gas particles if

the gas is heated?

A

It increases

21
Q

What happens to the gas pressure as the gas is

heated?

A

It increases

22
Q

What happens to the gas pressure as the

volume decreases?

A

It increases

23
Q

What is Boyle’s Law?

A

P x V equals a constant value

24
Q

What is the name given to smoke particles

random movement in the air?

A

Brownian motion

25
Q

What causes smoke particles to move

randomly?

A

Collisions with much smaller and faster invisible gas particles

physics (5 decks)

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