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Work and Power Quiz

Last updated about 2 hours ago

17 questions

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Question 1

1.

When you climb up a flight of stairs, you do 1500 J of work. How much work do you do if you climb up two identical flights of stairs?

3000 J

6000 J

750 J

1500 J

Question 2

2.

What is your power output when you do 1500 J of work in 30 seconds?

50 W

45000 W

0 W

450 W

Question 3

3.

A 500-kg car traveling with a speed of 10 m/s has 25,000 J of kinetic energy. How much kinetic energy does it have if its speed is doubled?

100000 J

200000 J

50000 J

75000 J

Question 4

4.

When Bob pushes a crate across a rough surface, Bob does _ work and friction does _ work.

Positive; Positive

Negative; Positive

Negative; Negative

Positive; Negative

Question 5

5.

A block slides down a frictionless ramp that is positioned at an angle of 15°above the horizontal. The work done by gravity is equal to

Question 6

6.

Two playful pups, Mattie and Rufus (4 kg) are playing tug-o-war with an old sock. Mattie pulls on the much smaller Rufus with a force of 35-N, to the right. She drags Rufus 10 meters across the floor. There is a 25-N frictional force acting on Rufus as Mattie drags him across the floor.

Draw the freebody diagram of 4kg Rufus.

Question 7

7.

Two playful pups, Mattie and Rufus (4 kg) are playing tug-o-war with an old sock. Mattie pulls on the much smaller Rufus with a force of 35-N, to the right. She drags Rufus 10 meters across the floor. There is a 25-N frictional force acting on Rufus as Mattie drags him across the floor.

Which equation would be used to find the work done by Mattie as she drags Rufus 10 meters?

Question 8

8.

Two playful pups, Mattie and Rufus (4 kg) are playing tug-o-war with an old sock. Mattie pulls on the much smaller Rufus with a force of 35-N, to the right. She drags Rufus 10 meters across the floor. There is a 25-N frictional force acting on Rufus as Mattie drags him across the floor.

Find the work done by Mattie as she drags Rufus 10 meters to the nearest joule.

Question 9

9.

Two playful pups, Mattie and Rufus (4 kg) are playing tug-o-war with an old sock. Mattie pulls on the much smaller Rufus with a force of 35-N, to the right. She drags Rufus 10 meters across the floor. There is a 25-N frictional force acting on Rufus as Mattie drags him across the floor.

Which equation would be used to find the work done by friction as Mattie drags Rufus 10 meters?

Question 10

10.

Two playful pups, Mattie and Rufus (4 kg) are playing tug-o-war with an old sock. Mattie pulls on the much smaller Rufus with a force of 35-N, to the right. She drags Rufus 10 meters across the floor. There is a 25-N frictional force acting on Rufus as Mattie drags him across the floor.

Find the work done by friction as Mattie drags Rufus 10 meters to the nearest joule.

Question 11

11.

Two playful pups, Mattie and Rufus (4 kg) are playing tug-o-war with an old sock. Mattie pulls on the much smaller Rufus with a force of 35-N, to the right. She drags Rufus 10 meters across the floor. There is a 25-N frictional force acting on Rufus as Mattie drags him across the floor.

Which equation would be the Fnet equation in the y-direction?

Question 12

12.

Two playful pups, Mattie and Rufus (4 kg) are playing tug-o-war with an old sock. Mattie pulls on the much smaller Rufus with a force of 35-N, to the right. She drags Rufus 10 meters across the floor. There is a 25-N frictional force acting on Rufus as Mattie drags him across the floor.

Find the work done by gravity as Mattie drags Rufus 10 meters to the nearest joule.

Question 13

13.

Two playful pups, Mattie and Rufus (4 kg) are playing tug-o-war with an old sock. Mattie pulls on the much smaller Rufus with a force of 35-N, to the right. She drags Rufus 10 meters across the floor. There is a 25-N frictional force acting on Rufus as Mattie drags him across the floor.

Which equation would be used to find the net work done on Rufus as Mattie drags Rufus 10 meters?

Question 14

14.

Two playful pups, Mattie and Rufus (4 kg) are playing tug-o-war with an old sock. Mattie pulls on the much smaller Rufus with a force of 35-N, to the right. She drags Rufus 10 meters across the floor. There is a 25-N frictional force acting on Rufus as Mattie drags him across the floor.

Find the net work done on Rufus as Mattie drags Rufus 10 meters to the nearest joule.

Question 15

15.

Two playful pups, Mattie and Rufus (4 kg) are playing tug-o-war with an old sock. Mattie pulls on the much smaller Rufus with a force of 35-N, to the right. She drags Rufus 10 meters across the floor. There is a 25-N frictional force acting on Rufus as Mattie drags him across the floor.

Which equation is the work-energy theorem?

Question 16

16.

Two playful pups, Mattie and Rufus (4 kg) are playing tug-o-war with an old sock. Mattie pulls on the much smaller Rufus with a force of 35-N, to the right. She drags Rufus 10 meters across the floor. There is a 25-N frictional force acting on Rufus as Mattie drags him across the floor. Rufus initially starts from rest.

Which equation is the one you will use to find the final speed of Rufus after moving 10 meters?

Question 17

17.

Two playful pups, Mattie and Rufus (4 kg) are playing tug-o-war with an old sock. Mattie pulls on the much smaller Rufus with a force of 35-N, to the right. She drags Rufus 10 meters across the floor. There is a 25-N frictional force acting on Rufus as Mattie drags him across the floor. Rufus initially starts from rest.

Find the final speed of Rufus after moving 10 meters to the nearest hundreth m/s.