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Hunter-Best [27]
3 years ago
13

Which describes the relationship between potential and kinetic energy of a ball thrown up in the air as it falls back to the gro

und?
A.
Gravitational potential energy increases; kinetic energy increases.


B.
Kinetic energy equals gravitational potential energy.


C.
Kinetic energy increases; gravitational potential energy decreases.


D.
The mass of the ball is required to answer this.
Physics
1 answer:
Gekata [30.6K]3 years ago
7 0
The answer is c, because ball is falling so its gravitationl potential energy decreases, but it kinetic energy increases. Energy is always conserved.
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Starting at t = 0 s , a horizontal net force F⃗ =( 0.285 N/s )ti^+(-0.460 N/s2 )t2j^ is applied to a box that has an initial mom
Irina-Kira [14]

Answer:

Explanation:

We know that Impulse = force x time

impulse = change in momentum

change in momentum = force x time

Force F = .285 t -.46t²

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change in momentum = ∫ F dt  where F is force

= ∫ .285ti - .46t²j dt

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When t = 1.9

change in momentum = .285 x 1.9² /2 i  -  .46 x 1.9³ / 3 j

= .514i - 1.05 j

final momentum

= - 3.1 i + 3.9j +.514i - 1.05j

= - 2.586 i + 2.85j

x component = - 2.586

y component = 2.85

7 0
3 years ago
How does changing your center of gravity affect the way you balance?
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3 years ago
If a basball is project upwards from the ground level with an initial velovaity of 32 feet per second, then it's height is a fun
inessss [21]

Answer:

Maximum height reached by the ball is 32 meters.

Explanation:

It is given that,

If a baseball is project upwards from the ground level with an initial velocity of 32 feet per second, then it's height is a function of time. The equation is given as :

s=-8t^2+32t...........(1)

t is the time taken

s is the height attained as a function of time.

Maximum height achieved can be calculated as :

\dfrac{ds}{dt}=0

\dfrac{d(-8t^2+32t)}{dt}=0

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t = 2 seconds

Put the value of t in equation (1) as :

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s = 32 meters

So, the maximum height reached by the ball is 32 meters. Hence, this is the required solution.

6 0
3 years ago
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