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WorksheetsConservation of Mechanical Energy Mojdeh
Total questions: 28
Worksheet time: 19mins
Name
Class
Date
1.
At which point is potential energy greatest?
a)
W
b)
X
c)
Y
d)
Z
2.
An object has 64 J of kinetic,134 J of potential, then it will have _____ of mechanical energy.
a)
8,576 J
b)
189 J
c)
70J
d)
198 J
3.
At which point(s) on the roller coaster is the kinetic energy at its maximum?
a)
A
b)
B
c)
C
d)
D
4.
At which point(s) on the roller coaster is the gravitational potential energy at its maximum?
a)
A
b)
B
c)
C
d)
D
5.
As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy?
a)
The PE and KE increase and decrease together
b)
The PE decreases while the KE increases
c)
Impossible to know without knowing the mass
6.
At which point is potential energy greatest?
a)
W
b)
X
c)
Y
d)
Z
7.
At which point is potential energy greatest?
a)
W
b)
X
c)
Y
d)
Z
8.
A bead is moving with a speed of 20 m/s at position A on the track shown in the figure. This track is friction-free, and there is no appreciable air resistance. What is the speed of the bead at point C?
a)
0 m/s
b)
34 m/s
c)
69 m/s
d)
20 m/s
9.
A toy rocket that weighs 10 N blasts straight up from ground level with an initial kinetic energy of 40 J. At the exact top of its trajectory, its total mechanical energy is 140 J. To what vertical height above the ground does it rise, assuming no air resistance?
a)
1.0 m
b)
10 m
c)
14 m
d)
24 m
10.
Which specific type of energy is at point A?
a)
Potential Energy
b)
Kinetic Energy
c)
Mechanical Energy
d)
None
11.
Which specific type of energy is at point B?
a)
Potential Energy
b)
Kinetic Energy
c)
Mechanical Energy
d)
None
12.
Which specific type of energy is at point C?
a)
Potential Energy
b)
Kinetic Energy
c)
Mechanical Energy
d)
None
13.
Which specific type of energy is at point D?
a)
Potential Energy
b)
Kinetic Energy
c)
Mechanical Energy
d)
None
14.
Which variable is always constant (doesn't change)?
a)
mass
b)
height
c)
velocity
d)
None
15.
What is the v in this equation? Choose the one with the CORRECT unit!
a)
volume (m3)
b)
velocity (m/s)
c)
velocity (m/s2)
d)
volume (v)
16.
What is the g? Choose the one with the correct unit!
a)
mass (kg)
b)
gravity (m/s)
c)
gravity (m/s2)
d)
grams (g)
17.
At the bottom of the roller coaster, what kind of energy is NEVER present?
a)
Potential Energy
b)
Kinetic Energy
c)
Mechanical Energy
d)
None
18.
When the velocity of the car is given, what kind of energy can we calculate right away?
a)
Potential Energy
b)
Kinetic Energy
c)
Mechanical Energy
d)
None
19.
9. A 1000kg car is traveling at 5m/s. How much kinetic energy does it have?
a)
25 J
b)
2500 J
c)
25000 m/s
d)
12,500 J
20.
Which 2 letters have the most kinetic energy
a)
W & Y
b)
X & Z
21.
How high must a 20kg box be lifted to give it 784J of potential energy?
a)
3.98 km
b)
392 m
c)
3.92 m
d)
3
22.
Mechanical Energy is
a)
KE-PE
b)
PE - KE
c)
The sum of PE & KE
23.
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
24.
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
25.
You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, what is the ball's velocity?
a)
6.32 m/s
b)
40 m/s
c)
4.47 m/s
d)
100 m/s
26.
A 2 kg ball has an initial velocity of 6 m/s. How high up the ramp will it go?
a)
1.8 m
b)
10 m
c)
6 m
d)
12 m
27.
A 120 kg skier is going 50m/s at the bottom of the hill. What is the height of the hill?
a)
150,000 m
b)
2.55 m
c)
127.5 m
d)
12,250 m
28.
A 75 kg skier is standing at the top of a 25 m hill. What would his speed be at the bottom of the hill?
a)
18,375 m/s
b)
11.06 m/s
c)
240,000 m/s
d)
22.1 m/s
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