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IgorLugansk [536]
3 years ago
7

Which of the following has no acceleration?

Physics
2 answers:
djverab [1.8K]3 years ago
7 0
D. As acceleration is a change of speed or direction.
Fantom [35]3 years ago
6 0

'Acceleration' means ANY change in speed or direction
of motion.

A).  Acceleration.  The satellite is in a curved orbit, so
its direction is constantly changing.

B).  Acceleration.  The person is on a curved track, so
his direction is changing.

C).  Acceleration.  The car is following a curve, so
its direction is changing.

D).  No acceleration.  Straight, at constant speed. 
No change of speed or direction.

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A ball is tossed in the air and released. It moves up, reverses direction, falls back down again, and is caught at the same heig
PolarNik [594]

Answer:

The potential energy has a  maximum when the ball is a time that is half of the time for total travel

Explanation:

Generally potential energy is a the varies directly with the height according to this formula

            PE =mgh

and the ball attains a maximum height when the time is equal to half of the total time taken to travel  

8 0
3 years ago
Read 2 more answers
A rifle with a longer barrel can fire bullets with a larger velocity than a rifle with a shorter barrel. Explain this using the
shepuryov [24]
The theory of impulse-momentum states that "t<span>he change in momentum of an object equals the impulse applied to it" meaning that the long barrel of the rifle covers a huge amount of motion of the bullet. The shot of the barrel is more accurate that way.

While work-energy theorem which states that "</span><span>the work done by all forces acting on a particle equals the change in the particle's kinetic energy" meaning that the discharge of the bullet caused by the barrel is slower but has more power than the one with the short barrel.</span>
8 0
3 years ago
What is the difference between a homogeneous mixture and heterogeneous mixture?
Semenov [28]
Homogenous mixtures don't have visible constituents. An example of this would be water.

Heterogenous ones have visible constituents and an example would be if you put some dirt in water and then it wouldn't mix properly and you could see the dirt in it.
4 0
3 years ago
During a free fall Swati was accelerating at -9.8m/s2. After 120 seconds how far did she travel?
SIZIF [17.4K]

-70560, -9.8/2 = -4.9

120^2 = 14400.

Now you multiply 14400 * -4.9 = -70560m.

4 0
4 years ago
What does increasing the impulse on an object due to its momentum?
allochka39001 [22]

increaskng the impulse also <u>increases </u><u>momentum</u>

7 0
2 years ago
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