Flashcards in Units & Equations Deck (42)

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1

## What is the equation relating speed, distance and time?

### Distance = speed x time or Speed = distance / time

2

## What is the unit for speed?

### m/s

3

## What is the equation relating weight, mass and gravitational field strength?

### weight = mass x gravitational field strength

4

## What is the unit for weight?

### N (it is a force)

5

## What is the unit for mass?

### kg

6

## What is the equation relating work done, force and distance?

### work done = force x distance

7

## What is the unit for work done?

### J or Nm

8

## What is the equation relating force in a spring. spring constant and extension?

### force = spring constant x extension

9

## What is the unit for force?

### Newtons

10

## What is the equation that relates moment, force and distance?

### Moment = force x distance

11

## What is the unit for moment?

### Nm

12

## What is the equation relating pressure, force and area?

### pressure = force / area

13

## What is the unit for pressure?

### N/m2 or Pa

14

## What is the equation relating acceleration, change in velocity (speed) and time?

### acceleration = change in speed / time taken

15

## What is the unit for acceleration?

### m/s2

16

## What is the equation relating force, mass and acceleration?

### force = mass x acceleration

17

## What is the equation relating momentum, speed and mass? (Higher Tier Only)

### momentum = speed x mass

18

## What is the unit for momentum?

### kgm/s

19

## What is the equation for kinetic energy?

### kinetic energy = 1/2 x mass x speed^2

20

## What is the unit for kinetic energy?

### J, Joules (all energy has units Joules)

21

## What is the equation for gravitational potential energy?

### G.P.E = mass x gravity x height

22

## What is the unit for gravitational potential energy?

### J

23

## What is the equation relating power, energy transferred and time?

### Power = energy transferred / time

24

## What is the unit for power?

### Watt, W

25

## What is the equation relating power, work done and time?

### Power = work done / time or Work done = power x time

26

## What is the equation for efficiency?

### efficiency = useful power/energy / total power/energy

27

## What is the equation relating wave speed, frequency and wavelength?

### wave speed = wavelength x frequency

28

## What is the unit for wave speed?

### m/s

29

## What is the unit for wavelength?

### m

30