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bixtya [17]
4 years ago
15

Which statement best defines work?

Physics
2 answers:
Lelu [443]4 years ago
8 0
It depends on what statement you need the word work in
attashe74 [19]4 years ago
5 0
Work: activity involving mental or physical effort done in order to achieve a purpose or result.
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Why was the Battle of the Bulge significant?
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The Battle of the Bulge in the winter of 1944 was the last Great German offensive of the Second World War.
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A 2-kg object is moving 6 m/s in a horizontal direction.
german

Answer: A) O N

Explanation:

An object in motion will maintain its state of motion. The presence of an unbalanced force changes the velocity of the object.

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Someone talk o me I’m bored
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Read 2 more answers
A student (m = 68 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a
Gnesinka [82]

Answer:

5.7141 m

Explanation:

Here the potential and kinetic energy will balance each other

mgh=\frac{1}{2}mv^2\\\Rightarrow v=\sqrt{2gh}

This is the initial velocity of the system and the final velocity is 0

t = Time taken = 0.04 seconds

F = Force = 18000 N

a = Acceleration

g = Acceleration due to gravity = 9.81 m/s²

Equation of motion

v=u+at\\\Rightarrow a=\frac{v-u}{t}

From Newton's second law

F=ma\\\Rightarrow F=m\frac{v-u}{t}\\\Rightarrow 18000=68\frac{0-\sqrt{2gh}}{0.04}\\\Rightarrow \frac{18000}{68}\times 0.04=-\sqrt{2\times 9.81\times h}\\\Rightarrow 10.58823=-\sqrt{2\times 9.81\times h}

Squarring both sides

112.11061=2\times 9.81\times h\\\Rightarrow h=\frac{112.11061}{2\times 9.81}\\\Rightarrow h=5.7141\ m

The height from which the student fell is 5.7141 m

5 0
3 years ago
A truck is parked at the bottom of a hill. It moves from the bottom of a hill
Marat540 [252]

Answer:

C

Explanation:

potential energy is stored energy that an object has due to its position or chemical composition. Since the truck has the possibility to move down the hill when it is at the top of the hill, it has a great amount of potential energy, howver when its at the bottom of the hill, it doesn’t have the possibility to move or can move v little due to its positions,  therefore it has little to no potienatal energy.

3 0
3 years ago
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