Equations

Question 1

acceleration in m/s

Answer 1

acceleration = final velocity(m/s) - initial velocity(m/s) / time(s)

Question 2

distance travelled in m

Answer 2

distance travelled = average speed(m/s) x time(s)

Question 3

Forces in newtons

Answer 3

forces in newtons = mass(kg) x acceleration (m/s²)

Question 4

weight in newtons

Answer 4

weight in newtons = mass (kg) x gravitational field strength (N/kg)

Question 5

gravitational potential energy in joules

Answer 5

gravitational potential energy = mass (kg) x gravitational field strength (N/kg) x height (m)

Question 6

kinetic energy in joules

Answer 6

kinetic energy = 1/2 x mass (kg) x v² (m/s)

Question 7

momentum in kg m/s

Answer 7

momentum = mass (kg) x velocity (m/s)

Question 8

wave velocity in m/s

Answer 8

wave velocity = frequency (Hz) x wavelength (m)

Question 9

Earths gravity

Answer 9

10m/s

Question 10

efficiency equation

Answer 10

efficiency= useful energy out / total energy in