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Biblioteka

Work & Power Practice

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Posljednje ažuriranje about 1 month ago
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Math Practice

Work = Force*distance

Power = work/time = (Force*distance)/time

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W=F*d W= Work measured in J

F= W/d F= Force measured in N

d= W/F d=distance measured in m

P=W/t P= Power measured in W

W= P*t t= time measured in s

P= (F*d)/t

F= (P*t)/ d

d= (P*t)/ F

t= (F*d)/ P

To show your work, I recommend uploading a screenshot of your Desmos calculation

Pitanje 1
1.

Work is a form of energy.

Pitanje 2
2.

A Watt is the standard metric unit of work.

Pitanje 3
3.

Work is a time-based quantity; it is dependent upon how fast a force displaces an object.

Pitanje 4
4.

Superman applies a force on a truck to prevent it from moving down a hill. This is an example of work being done.

Pitanje 5
5.

An upward force is applied to a bucket as it is carried 20 m across the yard. This is an example of work being done.

Pitanje 6
6.

An upward force is applied by a chain to a roller coaster car to carry it up the hill of the first drop of the Shockwave ride. This is an example of work being done.

Pitanje 7
7.

If person A and person B do the same job but person B does it faster, then person A does more work but person B has more power.

Pitanje 8
8.

Rusty Nales uses a hammer to exert an applied force upon a stubborn nail to drive it into the wall.

Pitanje 9
9.

The force of friction acts upon a baseball player as he slides into third base.

Pitanje 10
10.

Which of the following statements is the most true about Kinetic Energy?

Pitanje 11
11.

Which of the following statements is the most true about Potential Energy?

Pitanje 12
12.
Pitanje 13
13.

How much work is done on a 10 N block that is lifted 5 meters off the ground by a pulley?

Pitanje 14
14.

You did 170 J of work lifting a 140 N backpack. How high did you lift the backpack?

Pitanje 15
15.

A crane does 62,500 J of work to life a boulder a distance of 25.0 m. How much did the boulder weigh?

Pitanje 16
16.

A motor does 5,000 J of work in 20 seconds. What is the power of the motor?

Pitanje 17
17.

A machine that uses 200 W of power moves an object a distance of 15 m in 25s. Find the work done by the machine.

Pitanje 18
18.

A woman runs a kilometer using a force of 210N and a power output of 500W. How long in seconds (s) does it take this woman to complete 1000 m?

Pitanje 19
19.

A mechanic used a hydraulic lift to raise a 12,054 N car 1.89 m above the floor of a garage. It took 4.75 s to raise the car. What was the power output of the lift?

Pitanje 20
20.

How much work is done using a 500-watt microwave oven for 5 minutes?