WorksheetsKinetic Energy (Med-Difficult)
Total questions: 10
Worksheet time: 10mins
Name
Class
Date
1.
Calculate the Ek of a runner that has a mass of 80 kg and is running at a velocity of 8 m/s
a)
5120 J
b)
320 J
c)
640 J
d)
2560 J
2.
A 60 kg Ewok is travelling at a constant speed of 7 m/s. What is its kinetic energy in KJ?
a)
1.47 KJ
b)
210 KJ
c)
147 KJ
d)
1470 KJ
3.
What is the kinetic energy of a 1500 gram object moving at a velocity of 100 m/s
a)
112.5 J
b)
7,500,000 J
c)
75 J
d)
7,500 J
4.
What is the kinetic energy of a 25,000g object moving at a velocity of 2.5 m/s
a)
78.125 J
b)
31250 J
c)
781.25 J
d)
78,125 J
5.
How much kinetic energy does a person of mass 50kg running at 3m/s have? Provide your answer in KJ.
a)
225 KJ
b)
0.225 KJ
c)
75 KJ
d)
0.075 KJ
6.
What is the kinetic energy of a 30,000 g object moving at a velocity of 4 m/s. Provide you answer in KJ
a)
240,000 KJ
b)
240 KJ
c)
2400 KJ
d)
0.24 KJ
7.
If a cannonball flies at a speed of 15 m/s and has 675J of kinetic energy, what is its mass?
a)
90 Kg
b)
6 Kg
c)
350 Kg
d)
22.5 Kg
8.
An explosion of gas from a Hawaiian volcano blows a rock into the sky. the rock has 2000J of kinetic energy. What was its mass if the rock had a velocity of 20m/s
a)
200Kg
b)
20,000Kg
c)
10Kg
d)
200Kg
9.
An object with a kinetic energy of 2160 J has a mass of 120 kg. Calculate its velocity.
a)
720 m/s
b)
6 m/s
c)
36 m/s
d)
72 m/s
10.
An 8kg dog chases a cat. if the dog has 400J of kinetic energy. What is the speed of the dog?
a)
10 m/s
b)
5 m/s
c)
1 m/s
d)
100 m/s
100 %
