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Worksheetsพลังงานกล
Total questions: 20
Worksheet time: 30mins
Name
Class
Date
1.
gravitational potential energy is defined as
a)
the energy an object has due to its height above the ground
b)
the energy an object has due to its motion
c)
the energy a spring has due to its stretch
d)
the chemical energy stored in the molecules of atoms
2.
the equation for gravitational potential energy is
a)
PEg = mgh
b)
PEg= 1/2kx2
c)
PEg= Fd
d)
PEg = 1/2mv2
3.
What are the two types of Mechanical Energy? (ME)
a)
Kinetic and Potential Energy
b)
Kinetic and Nuclear Energy
c)
Potential and Chemical Energy
d)
Thermal and Kinetic Energy
4.
Kinetic Energy is defined as
a)
Energy stored due to its location
b)
Energy of motion
c)
Energy stored in the bonds of molecules
d)
Heat energy
5.
The equation to find kinetic energy is
a)
KE=1/2mv2
b)
KE=mgh
c)
KE=1/2kx2
d)
KE=Fd
6.
A 70 kg runner has a velocity of 5 m/s. Her kinetic energy is
a)
875 J
b)
175 J
c)
1750 J
d)
350 J
7.
Which of the following objects has the most kinetic energy?
a)
A 20 kg toddler running at 5 m/s
b)
A 50 kg toddler running at 30 m/s
c)
A 90 kg toddler running at 30 m/s
d)
A 100 kg toddler running at 2 m/s
8.
A 5 kg ball is lifted 12 m above the ground. It's gravitational potential energy is
a)
60 J
b)
600 J
c)
17 J
d)
2.4 J
9.
You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, what type of energy does it have?
a)
Potential Energy
b)
Kinetic Energy
c)
Nuclear Energy
d)
Chemical Energy
10.
You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, how much kinetic energy does it have?
a)
10 J
b)
100 J
c)
7 J
d)
20 J
11.
A force is a −
a)
push.
b)
pull.
c)
magnet.
d)
push or pull.
12.
This girl has jumped up in the air. What force will cause her to come back to the ground?
a)
Gravity
b)
Magnetism
c)
Electricity
d)
Sound
13.
Gravity is a force that ─
a)
pulls objects down.
b)
pulls objects toward the center of the Earth.
c)
pushes objects into the air.
d)
has no effect on objects.
14.
Is the ability of something to cause change in itself or other things
a)
Energy
b)
Sound
c)
Friction
d)
Motion
15.
A 69 kg ski jumper jumps and reaches a heigth of 10.7 m. What potential energy does she have?
a)
None of the above
b)
7000 Joules
c)
7235 Juloes
d)
7235 Joules
16.
What is potential energy?
a)
the energy an object has due to its position or condition
b)
the energy an object has due to its motions
c)
the energy an object has due to its chemical composition
d)
theh energy an object has due to its atomic structure
17.
When does an object have no kinetic energy?
a)
when it is at rest
b)
when it is moving very slowly
c)
when the only force that is acting on it is gravity
d)
when it has no electrical charge
18.
Which form of energy below is produced by hitting a drum?
a)
heat
b)
light
c)
sound
d)
solar
19.
The sum of the kinetic and potential energy in a system is known as the system's _____________________ energy.
a)
mechanical
b)
chemical
c)
thermal
d)
combined
20.
How much kinetic energy (K) does a baseball with a mass of 0.143 kg have if it is travelling at a velocity of 41.1 m/s?
HINT: K = 1/2mv2
a)
120.8 joules
b)
89.7 joules
c)
108.3 joules
d)
156.6 joules
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