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Nutka1998 [239]
3 years ago
10

A 60-kg block initially at rest on a frictionless horizontal surface is acted upon by a force of 3.0 N for a distance of 7.0 m.

How much kinetic energy does the block gain?
Physics
1 answer:
Schach [20]3 years ago
5 0

Answer:

Explanation:

Kinetic energy generated = work done by force = force x displacement

= 3 x 7 = 21 J

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When warm air rises, cold air will _____.
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Explanation:

sink and fill in space..........

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3 years ago
A stone of weight 10N falls from the top of a 250m high cliff. a) Calculate how much work is done by the force of gravity in pul
tiny-mole [99]

Answer:

work done = ( force × displacement)

(a)The force acting on the block is it's self weight and displacement is equal to height of the tower.

work done by gravity = (250 × 10) = 2500 joule

(b) The work done by gravity 2500 joule is transferred to the object in the form of it's kinetic energy.

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1 year ago
8TH GRADE SCIENCE PLEASE HELPPP
balu736 [363]

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The two helicopters have the same kinetic energy, but a different GPE, or gravitational potential energy.

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2 years ago
A machinist needs to remove a tight fitting pin of material A from a hole in a block made of material B. The machinist heats bot
Maurinko [17]

Answer:

The coefficient of thermal expansion of material B is more than A

Explanation:

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7 0
3 years ago
Can someone please explain to me why the net force of the ball changes in the Y direction and not the X Direction? I made little
stiks02 [169]
Whenever an object is in projectile motion, that is, it has 2-dimensional motion in the x and y axis, the resultant force on the object is in the y-direction.
This is because once the object has been projected, or the ball has been kicked in this case, there is no longer a force being applied on it in the x-direction. The air resistance is also neglected so the ball's final velocity in the x-direction is equal to its initial velocity in the x-direction.
However, the force of gravity cannot be neglected and causes the ball to come downwards. Therefore, after the ball has been projected, the net force on the ball is downwards, due to gravity. 
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