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Work Practice #2

Total questions: 14

Worksheet time: 18mins

Name
Class
Date
1.

I do 132 Joules of work on a bookcase. If I apply a force of 6 Newtons, how far have I moved the bookcase?

a)

22 meters

b)

792 meters

c)

17 meters

d)

320 meters

2.

Calculate the work needed to raise a 3 kg cat up to a height of 4 m. (g = 10ms-2)

a)

12 J

b)

0 J

c)

120 J

d)

1.22 J

3.

Sue lowers a stack of books with a mass of 20 kg over a distance of 2 meters. Calculate work. (g = 10ms-2)

a)

400 J

b)

-40 J

c)

-400 J

d)

-20 J

4.

With all of his Batgear on, Batman has a mass of 90.7 kg. How much work does he have to do to get to his perch on top of a 1,575 m building? (g = 10ms-2)

a)

142.9 kN

b)

142.9 kJ

c)

1.429 MN

d)

1.429 MJ

5.

Renatta Gass is out with her friends. Misfortune occurs and Renatta and her friends find themselves getting a workout. They apply a cumulative force of 1080 N to push the car 218 m to the nearest fuel station. Determine the work done on the car.

a)

2.35 x 105 J

b)

2.05 x 105 J

c)

1.35 x 105 J

d)

3.25 x 105 J

6.

Hans Full is pulling on a rope to drag his backpack to school across the ice. He pulls upwards and rightwards with a force of 22.9 Newtons at an angle of 35 degrees above the horizontal to drag his backpack a horizontal distance of 129 meters to the right. Determine the work (in Joules) done upon the backpack.

a)

2.42 x 103 J

b)

2.22 x 103 J

c)

3.12 x 103 J

d)

1.84 x 103 J

7.

Lamar Gant, U.S. powerlifting star, became the first man to deadlift five times his own body weight in 1985. Deadlifting involves raising a loaded barbell from the floor to a position above the head with outstretched arms. Determine the work done by Lamar in deadlifting 300 kg to a height of 0.90 m above the ground.

a)

2.6 x 103 J

b)

4.8 x 103 J

c)

1.5 x 103 J

d)

3.7 x 103 J

8.

Sheila has just arrived at the airport and is dragging her suitcase to the luggage check-in desk. She pulls on the strap with a force of 190 N at an angle of 35° to the horizontal to displace it 45 m to the desk. Determine the work done by Sheila on the suitcase.

a)

7.0 x 103 J

b)

4.9 x 103 J

c)

8.5 x 103 J

d)

3.1 x 103 J

9.
How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?
a)
15 J
b)
45 J
c)
0 J
d)
5 J
10.

Mr. B's and Mr. P's classes competed in a game of tug of war. Mr. B's class pulled to the right with a force of 4,000 N. Mr. P's class pulled to the left with a force of 5,000 N. As a result the rope moved 5.1 m to the left. How much work was done by the net force?

a)

4100 J

b)

3100 J

c)

5100 J

d)

45900 J

11.
How much work is done carrying a 10-N box horizontally across a floor for 8 m?
a)
80 J
b)
10 J
c)
8 J
d)
0 J
12.

The force used in the work equation has to always be acting in the same direction as the movement of the object.

a)

True

b)

False

13.
Groot rescues Rocket from the bottom of a deep pit. Groot expends 1000 J of energy lifting Rocket who has a mass of 50 kg out of the pit. How deep is the pit?
a)
0.5 m
b)
2 m
c)
4 m
d)
10 m
14.

The area under a force vs. displacement graph tells you the

a)

mass of the object

b)

momentum of the object

c)

work done on the object

d)

impulse of the object