1. A force of 10,000 N is applied to a stationary wall. How

1
1. A force of 10,000 N is applied to a
stationary wall. How much work is performed?
W F X D
2
1. A force of 10,000 N is applied to a
stationary wall. How much work is performed?
W F X D
10,000 N X 0 m
3
1. A force of 10,000 N is applied to a
stationary wall. How much work is performed?
W F X D
10,000 N X 0 m
0 Nm
4
1. A force of 10,000 N is applied to a
stationary wall. How much work is performed?
W F X D
10,000 N X 0 m
0 Nm
0 J
5
2. A 950-N skydiver jumps from an altitude of
3000 m. What is the total work performed on the
skydiver?
W F X D
6
2. A 950-N skydiver jumps from an altitude of
3000 m. What is the total work performed on the
skydiver?
W F X D
950 N X 3000 m
7
2. A 950-N skydiver jumps from an altitude of
3000 m. What is the total work performed on the
skydiver?
W F X D
950 N X 3000 m
2,850,000 J
8
3. You are walking from your math class to your
English class. You are carrying books that weigh
20 N. You walk 45 m down the hall, climb 15
meters up the stairs and then walk another 30 m
to your English class. What is the total work
done on the books?
W F X D
9
3. You are walking from your math class to your
English class. You are carrying books that weigh
20 N. You walk 45 m down the hall, climb 15
meters up the stairs and then walk another 30 m
to your English class. What is the total work
done on the books?
W F X D
20 N X 15 m
10
3. You are walking from your math class to your
English class. You are carrying books that weigh
20 N. You walk 45 m down the hall, climb 15
meters up the stairs and then walk another 30 m
to your English class. What is the total work
done on the books?
W F X D
20 N X 15 m
300 J
11
4. How much work is done by a crane that lowers
1000 N of material a distance of 150 m?
W F X D
12
4. How much work is done by a crane that lowers
1000 N of material a distance of 150 m?
W F X D
1000 N X 150 m
13
4. How much work is done by a crane that lowers
1000 N of material a distance of 150 m?
W F X D
1000 N X 150 m
150,000 J
14
5. A weightlifter lifts a 150 kg barbell above
his head from the floor to a height of 2 m. He
holds the barbell there for 5 seconds. How much
work does he do during that 5 second interval?
weight M X 9.8 N
kg
15
5. A weightlifter lifts a 150 kg barbell above
his head from the floor to a height of 2 m. He
holds the barbell there for 5 seconds. How much
work does he do during that 5 second interval?
weight M X 9.8 N
kg
150 kg X 9.8 N
kg
16
5. A weightlifter lifts a 150 kg barbell above
his head from the floor to a height of 2 m. He
holds the barbell there for 5 seconds. How much
work does he do during that 5 second interval?
weight M X 9.8 N
kg
150 kg X 9.8 N
kg
1470 N
17
5. A weightlifter lifts a 150 kg barbell above
his head from the floor to a height of 2 m. He
holds the barbell there for 5 seconds. How much
work does he do during that 5 second interval?
W F X D
18
5. A weightlifter lifts a 150 kg barbell above
his head from the floor to a height of 2 m. He
holds the barbell there for 5 seconds. How much
work does he do during that 5 second interval?
W F X D
1470 N X 0 m
19
5. A weightlifter lifts a 150 kg barbell above
his head from the floor to a height of 2 m. He
holds the barbell there for 5 seconds. How much
work does he do during that 5 second interval?
W F X D
1470 N X 0 m
0 J
20
6. A 5 kg rock is lifted 2 m in 5 sec. How much
work is done?
21
6. A 5 kg rock is lifted 2 m in 5 sec. How much
work is done?
weight M X 9.8 N
kg
5 kg X 9.8 N
kg
49 N
22
6. A 5 kg rock is lifted 2 m in 5 sec. How much
work is done?
W F X D
23
6. A 5 kg rock is lifted 2 m in 5 sec. How much
work is done?
W F X D
49 N X 2 m
24
6. A 5 kg rock is lifted 2 m in 5 sec. How much
work is done?
W F X D
49 N X 2 m
98 J
25
7. A teacher pushed a 10-kg desk across a a
floor for a distance of 5 m. She exerted a
horizontal force of 20 N. How much work was done?
W F X D
26
7. A teacher pushed a 10-kg desk across a a
floor for a distance of 5 m. She exerted a
horizontal force of 20 N. How much work was done?
W F X D
20 N X 5 m
27
7. A teacher pushed a 10-kg desk across a a
floor for a distance of 5 m. She exerted a
horizontal force of 20 N. How much work was done?
W F X D
20 N X 5 m
100 J
28
8. If 4,000 Nm are used to raise a 294 N object
. How high is the mass raised?
W F X D
29
8. If 4,000 Nm are used to raise a 294 N object
. How high is the mass raised?
W F X D
4,000 Nm 294 N X D
30
8. If 4,000 Nm are used to raise a 294 N object
. How high is the mass raised?
W F X D
4,000 Nm 294 N X D
4,000 Nm 294 N X D
294 N
294 N
31
8. If 4,000 Nm are used to raise a 294 N object
. How high is the mass raised?
W F X D
4,000 Nm 294 N X D
4,000 Nm 294 N X D
294 N
294 N
D 13.6 m
32
8. Alternate solution
D W
F
D 4000 Nm
294 N
D 13.6 m
33
9. A bulldozer performs 80,000 Nm of work
pushing dirt a distance of 16 m. What is the
force of the dirt?
W F X D
34
9. A bulldozer performs 80,000 Nm of work
pushing dirt a distance of 16 m. What is the
force of the dirt?
W F X D
80,000 Nm F X 16 m
35
9. A bulldozer performs 80,000 Nm of work
pushing dirt a distance of 16 m. What is the
force of the dirt?
W F X D
80,000 Nm F X 16 m
80,000 Nm F X 16 m
16 m
16 m
36
9. A bulldozer performs 80,000 Nm of work
pushing dirt a distance of 16 m. What is the
force of the dirt?
W F X D
80,000 Nm F X 16 m
80,000 Nm F X 16 m
16 m
16 m
F 5,000 N
37
9. Alternate solution
F 80,000 Nm
16 m
F 5000 N
38
10. An ant does 1 N-m of work dragging a
0.0020-N grain of sugar. How far does the ant
drag the sugar?
W F X D
39
10. An ant does 1 N-m of work dragging a
0.0020-N grain of sugar. How far does the ant
drag the sugar?
W F X D
1 Nm 0.0020 X D
40
10. An ant does 1 N-m of work dragging a
0.0020-N grain of sugar. How far does the ant
drag the sugar?
W F X D
1 Nm 0.0020 X D
1 Nm 0.0020 N X D
0.0020 N
0.0020 N
41
10. An ant does 1 N-m of work dragging a
0.0020-N grain of sugar. How far does the ant
drag the sugar?
W F X D
1 Nm 0.0020 X D
1 Nm 0.0020 N X D
0.0020 N
0.0020 N
D 500 m
42
10. Alternate solution
D W
F
D 1 Nm
0.0020 N
D 500 m