WorksheetsPhysics Quiz - Mechanical Energy Conversions and Work
Total questions: 11
Worksheet time: 55mins
A 7.0 kg ball is rolling down a hill at a velocity of 3.0 m/s. What is its kinetic energy? HINT: KE = 1/2 mv2
31.5 Joules
18.75 Joules
63.0 Joules
9.07 Joules
A soccer ball with a mass of 0.73 kg is suspended 2.0 meters above the ground. What is its gravitation potential energy? HINT: PE = mgh, where g = 9.8 N/kg
14.3 Joules
6.32 Joules
21.4 Joules
18.9 Joules
How much work is the guy doing on the 10 N weight as he lifts it to 2.0 meters above the floor? HINT: W = Fd
20.0 Joules
2.0 Joules
10.Joules
5.0 Joules
A man pushes a 300-N box along a flat, friction-less surface using a force of 600 N. The box was moved a
distance of 3.5 m. The actual work done by the worker was: HINT: W = Fd
2100 Joules
1050 Joules
1550 Joules
3000 Joules
At which point does the skier have the most potential energy?
W
X
Y
Z
When a force acts upon an object to cause a displacement of the object, what is said to have been done?
work
kinetic energy
decrease in velocity
potential energy
When the force acting on an object is opposite in direction to the displacement of the object is is referred to as:
negative work.
no work.
opposite work.
busy work.
Which of the following statements is true (assume there is no friction on the ramp)?
The kinetic energy of a skater increases as he rolls up the ramp while the gravitational potential energy decreases.
The gravitational potential energy of a skater decreases as he rolls down the ramp – at the same time the kinetic energy stays constant since he is always moving.
A skater’s kinetic energy increases as he rolls down the ramp. The gravitational potential energy decreases as he rolls down the ramp.
The skater’s total energy decreases over time and gets converted to thermal energy.
If the ball has 1000 J of kinetic energy the moment it is tossed upward, what is its potential energy at the top of its arc?
1000 J
2000 J
500 J
0 J
What is the sum of kinetic and potential energy called?
mechanical energy
thermal energy
electrical energy
nuclear energy
How much kinetic energy does a 2000 kg car have if it is traveling at a speed of 30m/s? HINT: KE = ½ mv2
900,000 Joules
1,800,000 Joules
450,000 Joules
1,350.000 Joules
