Worksheet: Kinetic Energy
Q1: How many times larger is the kinetic energy of a bullet of mass 0.005 kg
that has a velocity of 500 m/s than the kinetic energy of a drone with a mass
of 5 kg and a velocity of 5 m/s?
Question Video
A
20
B
2.5
C
10
D
5
E
12.5
Q2: A motorboat at rest on a lake has a mass of 665 kg. The motorboat then
accelerates until it has a kinetic energy of 340 480 J. When the motorboathas
accelerated, at what rate does it move toward a stationary boat that isdirectly
in front of it?
1
A
1 024 m/s
B
32 m/s
C
16√2 m/s
D
32√2 m/s
E
16 m/s
Q3: A hummingbird has a mass of 40 g. The hummingbird flies in a straight
line between two flowers 18 m apart in a time of 12 s. What is the average
kinetic energy of the hummingbird while flying between the flowers?
A
0.0036 J
B
0.09 J
C
0.045 J
D
0.03 J
E
45 J
Q4: An object has 75 J of kinetic energy and a mass of 1.5 kg.What is the
velocity of the object?
2
A
5 m/s
B
5√2 m/s
C
25√2 m/s
D
50 m/s
E
10 m/s
Question Video
Q5: An object that has 9 J of kinetic energy is moving at 3 m/s.What is the
mass of the object?
A
9 kg
B
2 kg
C
18 kg
D
6 kg
E
1 kg
Q6: An object with a mass of 1.25 kg has a velocity of 12 m/s. What is the
object’s kinetic energy?
3
A
225 J
B
15 J
C
112.5 J
D
90 J
E
180 J
Q7: An object’s kinetic energy when it moves at different velocities is shown
in the table. What is the object’s mass in grams?
Question Video
Velocity (m/s)
1
2
3
4
5
Kinetic Energy (J) 0.1 0.4 0.9 1.6 2.5
A
200 grams
B
50 grams
C
66.67 grams
D
0.2 grams
E
100 grams
Q8: The quantity 𝑣, the velocity of an object, is how much the object changes
its displacement from a given position each second. The quantity 𝐸 is the
kinetic energy of an object. Which of the following formulas correctly shows
the relationship between 𝑣, 𝐸, and the mass of the object?
4
A
𝐸 = 𝑚𝑣
B
1
𝐸 = 𝑚2 𝑣 2
2
C
𝐸 = 𝑚2 𝑣 2
D
1
𝐸 = 𝑚𝑣2
2
E
𝐸 = 𝑚𝑣 2
Q9: A motorcycle of mass 250 kg moving at 32 m/s has four times as much
kinetic energy as a 640 kg mass car. What is the velocity of the car?
A
10 m/s
B
12.5 m/s
C
10√2 m/s
D
20 m/s
E
100 m/s
Q10: An object’s kinetic energy when it moves at differentvelocities is shown
in the graph.
7
Kinetic Energy (J)
6
5
4
3
2
1
0
5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Velocity (m/s)
3.5
4.0
4.5
5.0
What is the kinetic energy of the object when its instantaneous velocity is
2 m/s?
A
20 J
B
0J
C
5J
D
12 J
E
32 J
What is the kinetic energy of the object when its instantaneous velocity is
4 m/s?
6
A
12 J
B
0J
C
20 J
D
5J
E
32 J
What is the object’s mass?
7
A
5 kg
B
7 kg
C
2.5 kg
D
1.25 kg
E
20 kg