Answer:
The experiments are not shown, so I will answer in a general way.
By the first Newton's law, an object will only change it's velocity if there is a net force different than zero acting on the object.
Then in the experiments (depending on the experiment), you can see different things.
If an object is not moving and you apply a force in it, the object will move.
If an object is moving and you apply a force in the opposite direction of it's motion, the motion will: decrease the speed, stop at all, or move in the opposite direction. Depending on the force that you apply.
An excellent experiment (but hard to do) is dropping an object from a really high place.
The gravitational force will pull down the object and the object will start to increase it's velocity.
But there is the air resistance, that opposes to this motion and increases with the speed of the object.
Then there is a given speed such that the air resistance force will be equal to the gravitational force, then we have a balanced force (the net force is zero) which means that the object will keep falling at a constant velocity.
Heat is most closely related to THERMAL energy.
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This question is checking to see whether you understand the meaning
of "displacement".
Displacement is a vector:
-- Its magnitude (size) is the distance between the start-point and
the end-point, no matter what route might have been followed along
the way.
-- Its direction is the direction from the start-point to the end-point.
Talking about the Earth's orbit around the sun, we can forget about
the direction of the displacement, and just talk about its magnitude
(size).
If we pretend that the sun is not moving and dragging the whole
solar system along with it, then what do we see the Earth doing
in one year ?
We mark the place where the Earth is at the stroke of midnight
on New Year's Eve. Then we watch it as it swings around through
this gigantic orbit, all the way around the sun, and in a year, it's back
to the same point that we marked !
So what's the magnitude of the displacement in exactly one year ?
It's the distance between the start-point and the end-point. But the
Earth came back to the same place it started from, so there's no
separation at all between the start-point and the end-point.
The Earth covered a huge distance in that year, but the displacement
is zero.
Answer:
There isn't enough information to solve. Is this related to a graph? The initial and final velocities are needed. The expression for solving is noted under Explanation.
Explanation:
Given final velocity, initial velocity and displacement, one can solve for the acceleration using:
a=v2−u22s,
where v is final velocity (m/sec), u is initial velocity (m/sec) and s it the distance travelled (in m).