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Lady_Fox [76]
3 years ago
13

A 140

Physics
1 answer:
Doss [256]3 years ago
7 0
There is not enough information given tl be able to solve this problem
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A 2.55 kg block starts from rest on a rough inclined plane that makes an angle of 60 degree with the horizontal. the coefficient
lorasvet [3.4K]

Answer:

Change in mechanical energy = work done by friction

so it is equal to

W = -8.16 J

Explanation:

As we know that change in mechanical energy must be equal to the work done by non conservative forces only

So here when block moves down the inclined plane then the work done by friction force is given as

W = F.d

here we have

F = \mu F_n

here we know that

F_n = mg cos\theta

so we have

F_n = 2.55(9.81)(cos60)

F_n = 12.5 N

Now the friction force on the block is given as

F_f = \mu F_n

F_f = 0.25 \times 12.5

F_f = 3.13 N

now work done by the friction is given as

W = -(3.13)(2.61)

W = -8.16 J

7 0
3 years ago
4. Name three things that all games, no matter where they are played around the world, have in common.
lilavasa [31]

Answer:

Key components of games are goals, rules, challenge, and interaction.

Explanation:

Hope I helped.

3 0
3 years ago
Read 2 more answers
Plan a controlled experiment to investigate how an object’s position is related to the amount of its potential energy by measuri
igor_vitrenko [27]

Answer:

Feeling like an addict that ain't had it, up and at it in a minute

If it hadn't been invented, my limit wouldn't be infinite

I'm feeling like an infant in a womb

I'ma be here 'til the tomb

Lately I've been in my room

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3 0
2 years ago
PLEASE HELP also i know this isnt physics but there was no HOPE/Gym subject for me to choose.
Andreyy89

Answer:

Plan B.

Because flexibility is best improved by stretching.

Explanation:

Improving and increasing flexibility is done by having stretching sessions daily which maintains and widens the range of motion in the joints and stretches muscles.

4 0
2 years ago
Should we continue to rely on fossils fuels, such as coal, oil, and natural gas, as energy sources? Or, should we invest more in
Dennis_Churaev [7]

Answer:

i`d say energy

Explanation:

7 0
3 years ago
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