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WorksheetsWORK ENERGY POWER
Total questions: 30
Worksheet time: 15mins
Work is defined as
product when a force act on an object and its move the object at certain distance
type of job need to do
something that need power
product of energy
The unit of work is
watt
hertz
joule
pascal
The equation for work is
work = power x mass
work = power / time
work = force x distance
work = distance x time
A student needs 10 Newtons of force to lift a box to the top of a 2 meter shelf. How much work do they do?
12 J
8 J
20 J
5 J
A soccer player kicks a ball with 20 Newtons of force causing it to travel 100 meters. How much work is done on the ball?
200 J
80 J
5 J
2000 J
A worker climbs a ladder and does 8 J of work on a 2 N object. What is the distance they lift the object?
18 m
4 m
10 m
6 m
The equation for POTENTIAL ENERGY is
PE = mass x gravity x height
PE = gravity x weight
PE = height / work
PE = work / time
The equation for KINETIC ENERGY is
KE = mass x gravity
KE = 1/2 height x speed
KE = mass2
KE = 1/2 mass x speed2
The ability to do work is cause change:
work
energy
momentum
power
Which of these items is not part of the law of conservation of energy?
energy cannot be created
energy cannot be destroyed
energy can be transferred between forms
energy is destroyed by friction
At which point of this roller coaster is the energy 1/2 kinetic and 1/2 potential?
A
B
C
D
The SI Unit for Energy is
Joule
Newton
Calorie
Watt
What is the work output of a machine that has a work input of 2,800 Joules and an efficiency of 90%?
25200 J
2520 J
0.0082J
What is the potential energy of a 3kg ball that is on the ground?
0 J
3 J
9.8 J
29.4 J
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
What is the energy possessed by the cart?
potential energy
kinetic energy
mostly potential
mostly kinetic
How will you describe the energy at Point A?
mostly potential energy
mostly kinetic energy
losing PE, gaining KE
losing KE, gaining PE
An object has 12.4 J of potential energy and 23.5 J of kinetic energy. What is the mechanical energy of the system?
11.1 J
1.895 J
35.9 J
291.4 J
If you drive your 1,000 kg car from sea level up to the Nu'uanu Pali lookout, which is 366 m above sea level, how much will you have increased your car's gravitational potential energy?
3,000,000 J
366,000 J
3,586,800 J
586,800 J
If a 2 kg ball is traveling at 4 meters per second, what is its kinetic energy?
1 J
2 J
4 J
8 J
16 J
