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Worksheetspower
Total questions: 25
Worksheet time: 48mins
How do you calculate power?
Power =timeWork done
Power = Energy * time
Power = Work done * time
Power = timeForce
________________ is the rate at which work is done.
Power
Work
Time
Energy
The property of an object or system that allows it to do work is ________________.
Work
Energy
Power
Distance
What is needed calculate power? Choose 2 closest answers.
work
time
mass
distance
Two workers use 100 N of force to move a sofa 2 meters in 2 seconds. How much power is required?
100 watts
400 watts
104 watts
50 watts
A crane carries an 8-m long steel girder weighing 2600 N out 12 m to the end of the crane in 10 seconds. The crane used ___ of power.
0 W
260 W
2080 W
3120 W
A 40-kg person is climbing up a flight of stairs in 6 seconds producing 200 W of power. How much work did the person do climbing the stairs?
400 J
1200 J
50 J
33.3 J
A 40-kg person is climbing 3 m up a flight of stairs in 6 seconds. How much power did they exert climbing the stairs?
400 W
1200 W
200 W
120 W
Which statement does not illustrate power?
A farmer plowing the rice field all day.
A Siberian husky pulling a sled all day.
A principal sitting on a chair while observing several classes all day.
A teacher encoding his power point presentation in his laptop all day.
Who has the most power?
Ms Criza who encodes her observation tools using 12000J of work in 20 minutes.
Sir Pau who studies his 5 lessons for the next classes in 15 minutes.
Mrs Punzalan who used 50N force to inoculate mushrooms at a speed of 2m/s.
Mrs Masalunga who watches her learners while taking their quiz in 30 minutes.
A 100 N force is applied to move an object a horizontal distance of 5 meters at constant speed in 10 seconds. How much power is done?
50J
50W
500J
500W
How much power is generated by Ashley (50 kg) running up a 6 m flight of stairs in 5 seconds?
60 W
62 W
600 W
1500 W
On a work vs time graph, you can calculate the power by
the area.
the y-axis.
the y-intercept.
the slope.
How much power was generated from 0-4 seconds?
1100 W
4 W
267 W
1600 W
If it took 9 seconds for the object to move 6 meters, what's the power?
81 W
27 W
3 W
6 W
If you run up the stairs slower you will
do more work.
do less work.
generate more power.
generate less power.
A girl weighs 400 N. She runs up a flight of stairs of height 5 m in 4 seconds. Her power is:
320 W
400 W
500 W
2 000 W
Groot rescues Rocket from the bottom of a deep pit. Groot expends 4000 W of energy lifting Rocket who has a mass of 50 kg out of the pit in 0.25 seconds. How deep is the pit?
0.5 m
2 m
10 m
20 m
An Xbox consumes 15.7 watts while in standby mode. If you leave it in standby mode for 86,400 seconds (one day), how much work was done?
5,503 J
1,356,480 J
1,81,713 J
135,648 J
How much time is needed to produce 720 Joules of work if 90 watts of power is used?
3 s
8 s
64800 s
30 s
A person weighing 600 N gets on an elevator. The elevator lifts the person 6 m in 10 seconds. How much power was used?
360 W
10 W
36000 W
1000 W
Would it be easier to move a box of the same mass up a ramp that was long and gradual or short and steep?
long and gradual
short and steep
both are the same
