Answer ALL questions. Look for any feedback given if you get an answer incorrect. Keep choosing an answer until you get it correct. CORRECT or INCORRECT answers are indicated at the TOP of the page. A score is given at the TOP of the page when the exercise has been completed.
What is the (SI) unit of measure for ENERGY?
joule
watt
coulomb
newton
What is the (SI) unit of measure for POWER?
joule
watt
coulomb
newton
What is the unit of measure used for 'work done'?
joule
watt
newton
coulomb
Identify the formula use to calculate 'work done'?
w.d.= force / distance
w.d.= force x distance
w.d.= mass / distance
w.d.= mass x distance
The standard formula for 'work done' is rearranged below. Which one has been correctly rearranged (transposed)?
mass = work done/(gravity x distance)
mass = (gravity x distance)/work done
mass = (work done x gravity)/distance
mass = distance/(work done x gravity)
Identify the formula for calculating power?
power = force x distance
power = mass / time
power=(force x gravity x dist)/time
power = (work done) / time
What is 'the rate of doing work' a measure of?
work done
energy
power
efficiency
What number is used to represent 'gravity'?
9.81 m/s
9.81 m/s squared
8.91 m/s
8.91 m/s squared
Convert the following value correctly: 56750 W
567kW
0.057MW
56.75MW
5.675kW
How many seconds in 3 minutes and 35 seconds
215 seconds
180 seconds
255 seconds
335 seconds
Convert 1 hour, 13 minutes, 22 seconds into 'seconds'?
4402 seconds
4202 seconds
4422 seconds
4242 seconds
How many seconds in 'one hour'?
360 seconds
3600 seconds
660 seconds
6630 seconds
How many 'watts' are there in 'one kiloWatt-hour' ? - (the units used in an electricity meter for calculating electricity bills)
360,000 W
3.6 MW
360kW
3,600 W
A crane lifts 50kg a distance of 50m in 60 seconds, calculate the POWER required to do this?
408.75 W
41.67 W
14.72MW
15,291 W
A crane lifts a pallet of bricks a distance of 25m in 20s. If the mass of the bricks is 0.5 tonnes, calculate the power required?
6.131kW
625kW
61.2kW
62.5kW
A mass equal to 45kg is moved a distance of 40m in 25 seconds. Calculate the 'Work Done'?
17658J
45000J
706.32J
72J
A mass equal to 45kg is moved a distance of 40m in 25 seconds. Calculate the 'power'?
17658W
45000W
706.32W
720W
Identify the term used for 'stored' energy
kinetic energy
potential energy
calorific energy
static energy
Identify the term used for energy 'in motion'
kinetic energy
potential energy
calorific energy
static energy
Identify the correct unit of measure for a domestic energy meter as found in the home