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Natasha_Volkova [10]
3 years ago
13

A book sitting on a shelf has gravitational potential energy. true or false

Physics
2 answers:
Darya [45]3 years ago
8 0

Answer:

False

Explanation:

A book resting on a shelf has no potential energy relative to the shelf, since it has height of zero meters relative to the shelf.

mart [117]3 years ago
8 0

Answer:

True

Explanation:

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What is a lever and mention its types<br>​
Grace [21]

Answer:

Three different types of levers exist, depending on where the input force, fulcrum, and load are. A class 1 lever has the fulcrum between the input force and load. A class 2 lever has the load between the fulcrum and input force. A class 3 lever is a lever that has the input force in between the fulcrum and the load.

Explanation:

3 0
2 years ago
Answer this question​
kow [346]

Answer:

15) C

16) A

17) D

18) D

19) A

22) B

23) D

I might be wrong though

6 0
3 years ago
What is the amount of work done when JoAnne throws a baseball 2 meters at a force of 40
sergiy2304 [10]

Answer:

Amount of work done by Joanne = 80 joule

Explanation:

Given:

Displacement of ball = 2 meters

Force applied = 40 newtons

Find:

Amount of work done by Joanne

Computation;

Work done = Force applied x Displacement

Amount of work done by Joanne = Force applied x Displacement of ball

Amount of work done by Joanne = 40 x 2

Amount of work done by Joanne = 80 joule

5 0
3 years ago
A car drives 2 miles north, 4 miles west, 2 miles south and then drives 6 miles east. What is the car's distance?
geniusboy [140]

Answer:

Ok, so the car has traversed a total of 2 + 4 + 2 + 6 = 14 miles.

That's the car's distance! :)

For the displacement, you can draw out a diagram. I'll try my best to make one using a keyboard xDDD

 -    -   -   -    |

 |                  |

 |    -   -    -  start  -   end!

So, this is the journey of the car: Going two up, 4 left, 2 down, and 6 right.

This ends up 2 to the right of the beginning!

That's a 2 mile displacement :)

Can you give me brainliest for my splendid diagram? xD

4 0
2 years ago
a pulley is used to lift a 2000 N safe over frosty's head. the safe is lifted 6m in 4s by Rudolph. how much power did Rudolph us
garri49 [273]

Answer:

3000W

Explanation:

Given parameter:

Weight of safe  = 2000N

Height of lift = 6m

Time = 4s

Unknown:

Power used by Rudolph = ?

Solution:

Power is the rate at which work is being done. It is expressed as:

 Power  = \frac{Work done }{Time taken}  

   Work done  = Weight x height = 2000 x 6  = 12000J

Power  = \frac{12000}{4}   = 3000W

8 0
2 years ago
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