Year 10

Question 1

What is the equation used to determine weight?

Answer 1

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

Question 2

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

Answer 2

700N

Question 3

What is Earth’s gravitational field strength?

Answer 3

10 N/kg (technically 9.8)

Question 4

What is the Moon’s gravitational field strength?

Answer 4

1.6 N/kg

Question 5

What does a 100kg astronaut weigh on the moon?

Answer 5

160 N/kg

Question 6

What is the gradient of a distance-time graph?

Answer 6

Speed.

Question 7

What is the gradient of a speed-time graph?

Answer 7

Acceleration.

Question 8

What is the gradient of an acceleration-time graph?

Answer 8

The jerk.

Question 9

What is the gradient of a jerk-time graph?

Answer 9

The snap or jounce.

Question 10

What is Newton’s second law?

Answer 10

F = ma

Question 11

What is the equation for a straight-line graph?

Answer 11

y = mx + c

Question 12

What is stopping distance?

Answer 12

Thinking distance + braking distance

Question 13

What factors affect thinking distance?

Answer 13

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

Question 14

What is the change in momentum called

Answer 14

Impulse

Question 15

Momentum equation

Answer 15

p = mv

Question 16

a symbol?

Answer 16

Acceleration

Question 17

s symbol in physics?

Answer 17

Displacement (distance)

Question 18

In maths: d = st

Answer 18

In physics: s = vt

Question 19

Equation for force

Answer 19

F = ma

Question 20

Equation for change in velocity with constant acceleration

Answer 20

v^2 = u^2 + 2as

Question 21

Equation for acceleration

Answer 21

a = (v - u) / t

Question 22

Remember in the test

Answer 22

write in detail.

Question 23

Define a Sankey diagram

Answer 23

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

Question 24

efficiency formula

Answer 24

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

Question 25

Equation for power

Answer 25

Power (watts) = Work done (joules) / time (seconds)

Question 26

Equation for gravitational potential energy

Answer 26

Gravitational Potential Energy (joules) = mass (kg) x gravitational field strength (N/kg) x height (m)

Question 27

Equation for kinetic energy

Answer 27

Kinetic Energy (joules) = 1/2 x mass (kg) x speed squared (m/s)

Question 28

Equation for work done

Answer 28

Work done (joules) = force (N) x displacement (m)

Question 29

3 types of heat transfer

Answer 29

Convection - through gas or liquid -requires matter
Conduction - through solid - requires matter
Radiation - through EM waves - doesn’t require matter

Question 30

Definition of insulator

Answer 30

A material that does not conduct heat well

Question 31

Definition of conductor

Answer 31

A material that does allow heat to pass through it

Question 32

brownian motion?

Answer 32

non-visible particles colliding w/ visible ones

evidence for the particle model

Question 33

density equation

Answer 33

density in kg/m^3 (ρ) = mass in kg (m) / volume in m^3 (V)

Question 34

specific heat capacity equation

Answer 34

E = mcΔT

Question 35

pressure equation

Answer 35

pressure in Pa (p) = force in N (F) / area in m^2 (A)

Question 36

change in pressure equation

Answer 36

Δp = ρ x g x Δh

Question 37

boyle’s law

Answer 37

P (subscript) 1 x V (subscript) 1 = P (subscript) 2 x V (subscript) 2

Question 38

force + spring constant

Answer 38

Force (N) = k (N/m) * e (m)