Year 10 Flashcards

1
Q

What is the equation used to determine weight?

A

Weight (N) = mass (kg) x gravitational field strength (N/kg)

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2
Q

An astronaut has a mass of 70 kg, what do they weigh on Earth?

A

700N

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3
Q

What is Earth’s gravitational field strength?

A

10 N/kg (technically 9.8)

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4
Q

What is the Moon’s gravitational field strength?

A

1.6 N/kg

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5
Q

What does a 100kg astronaut weigh on the moon?

A

160 N/kg

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6
Q

What is the gradient of a distance-time graph?

A

Speed.

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7
Q

What is the gradient of a speed-time graph?

A

Acceleration.

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8
Q

What is the gradient of an acceleration-time graph?

A

The jerk.

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9
Q

What is the gradient of a jerk-time graph?

A

The snap or jounce.

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10
Q

What is Newton’s second law?

A

F = ma

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11
Q

What is the equation for a straight-line graph?

A

y = mx + c

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12
Q

What is stopping distance?

A

Thinking distance + braking distance

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13
Q

What factors affect thinking distance?

A

Condition of driver (DUI, etc.), visibility, speed of approaching object.

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14
Q

What is the change in momentum called

A

Impulse

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15
Q

Momentum equation

A

p = mv

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16
Q

a symbol?

A

Acceleration

17
Q

s symbol in physics?

A

Displacement (distance)

18
Q

In maths: d = st

A

In physics: s = vt

19
Q

Equation for force

20
Q

Equation for change in velocity with constant acceleration

A

v^2 = u^2 + 2as

21
Q

Equation for acceleration

A

a = (v - u) / t

22
Q

Remember in the test

A

write in detail.

23
Q

Define a Sankey diagram

A

an efficiency diagram - wasted coming out the bottom, useful continuing along the top

24
Q

efficiency formula

A

efficiency (%) = (output / input) x 100

25
Equation for power
Power (watts) = Work done (joules) / time (seconds)
26
Equation for gravitational potential energy
Gravitational Potential Energy (joules) = mass (kg) x gravitational field strength (N/kg) x height (m)
27
Equation for kinetic energy
Kinetic Energy (joules) = 1/2 x mass (kg) x speed squared (m/s)
28
Equation for work done
Work done (joules) = force (N) x displacement (m)
29
3 types of heat transfer
Convection - through gas or liquid -requires matter Conduction - through solid - requires matter Radiation - through EM waves - doesn't require matter
30
Definition of insulator
A material that does not conduct heat well
31
Definition of conductor
A material that does allow heat to pass through it
32
brownian motion?
non-visible particles colliding w/ visible ones | evidence for the particle model
33
density equation
density in kg/m^3 (ρ) = mass in kg (m) / volume in m^3 (V)
34
specific heat capacity equation
E = mcΔT
35
pressure equation
pressure in Pa (p) = force in N (F) / area in m^2 (A)
36
change in pressure equation
Δp = ρ x g x Δh
37
boyle's law
P (subscript) 1 x V (subscript) 1 = P (subscript) 2 x V (subscript) 2
38
force + spring constant
Force (N) = k (N/m) * e (m)