WorksheetsFCHS Physics 1 Work Energy Power
Total questions: 19
Worksheet time: 1hrs 1mins
Which of the following is not an example of work?
Doing homework
climbing the stairs
pushing a box up a ramp
lifting a pencil off the table
Which of the following use Joules as the unit?
Energy
Power
Time
Work
A student carries a stack of textbooks across the room without doing any work on the books. How is that possible?
It isn't the student did work on the books
The student did not exert any force on the books
The student exerted a force on the books perpendicular to the direction of movement
The student exerted a force on the books but did not move them.
A student pushed against the wall as hard as they could but did not do any work on the wall. How is this possible?
It isn't, the student did work on the wall
The student did not exert any force on the wall
The student exerted a force on the wall perpendicular to the direction of movement
The student exerted a force on the wall but did not move it
A student pushed a broom across the floor without doing any work on the broom. How is this possible?
It isn't, the student did work on the broom
The student did not exert any force on the broom
The student exerted a force on the broom perpendicular to the direction of motion
The student exerted a force on the broom but did not move it
Two springs are used in parallel to close a door. If k1=1.2 N/m and k2=1.5 N/m what is the effective spring constant?
2.7 n/m
1.8 N/m
0.67 N/m
1.5 N/m
Two springs are used in series to hang a sign. If k1=1.2 N/m and k2=1.5 N/m what is the effective spring constant?
2.7 n/m
1.8 N/m
0.67 N/m
1.5 N/m
The gravitational potential energy of an object is 150 J. What is the new energy if the mass is halved?
600 J
300 J
75 J
37.5 J
The gravitational potential energy of an object is 150 J. What is the new energy if the height is doubled?
600 J
300 J
75 J
37.5 J
The kinetic energy of an object is 150 J. What is the new energy if the mass is doubled?
600 J
300 J
75 J
37.5 J
The kinetic energy of an object is 150 J. What is the new energy if the velocity is halved?
600 J
300 J
75 J
37.5 J
A 80-kg skydiver has a speed of 60 m/s at an altitude of 800 m above the ground. What is the gravitational potential energy of the skydiver?
470400 J
627200 J
47040 J
3800000 J
A 80-kg skydiver has a speed of 60 m/s at an altitude of 800 m above the ground. What is the kinetic energy of the skydiver?
14400 J
5800000 J
2400 J
26000000 J
Total Mechanical energy consists of Gravitational Potential Energy, Kinetic Energy, and _ Energy
(a)
In the real world, if a skater starts at the top of a half pipe, which of the following statements is true
The skater will come up to the same height on the other side because energy is conserved
The skater will not reach the same height on the other side because energy is not conserved
The skater will not reach the same height because energy is conserved but some of the energy is converted to thermal energy
A 80-kg skydiver has a speed of 60 m/s at an altitude of 800 m above the ground. What is the total mechanical energy of the skydiver?
14400 J
654400 J
784000 J
641600 J
A 60-kg child on a skateboard is moving at a speed of 2 m/s. After a force acts on the child, her speed is 3 m/s. What is the change in kinetic energy of a child?
30 J
150 J
75 J
15 J
Based on the Hooke's law the force applied to an object is directly proportional to the extension. How would the graph of force vs extension look like?
a.
b.
c.
d.
If a spring (k=5.2 N/m) is compressed 20 cm, what is the energy stored in the spring?
0.104 J
0.208 J
1040 J
2080 J
