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Liula [17]
3 years ago
15

Use the position equation given below, where s represents the height of the object (in feet), v0 represents the initial velocity

of the object (in feet per second), s0 represents the initial height of the object (in feet), and t represents the time (in seconds), as the model for the problem.
s = –16t2 + v0t + s0
You drop a coin from the top of a building. The building has a height of 942 feet.
(a) Use the position equation to write a mathematical model for the height of the coin.
s=__________

(b) Find the height of the coin after 4 seconds.
s = _______ ft

(c) How long will it take before the coin strikes the ground? (Round your answer to two decimal places.)
t = _______ sec
Physics
1 answer:
mixer [17]3 years ago
6 0
Yes i think so!!!
i think..
your totally right Angi. 
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11Alexandr11 [23.1K]
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3 years ago
Match the situation with the energy transformation ITEMBANK: Move to Top A boy shooting a rubber band across the classroom A chi
Sonbull [250]
A boy shooting a rubber band across the classroom --> 
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A child going down a slide on a playground --> </span>Gravitational potential energy transformed into kinetic energy 
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Rubbing your hands together to warm them on a cold day --> </span>Kinetic energy being transformed into thermal energy <span>
When rubbing hands, we are moving them (kinetic energy), and this energy raises the temperature of the hand's surface (thermal energy)

Turning on a battery operated light --> </span>
Chemical potential energy transformed into radiant energy <span>
A battery works by mean of chemical reactions (chemical potential energy), producing light (so, emitting energy by radiation, i.e. radiant energy)

Using a dc electric motor --> </span> Electrical energy transformed into kinetic energy<span>
A dc electric motor works using  currents (so, electrical energy), and the energy produced can be used for example to accelerate a car (kinetic energy)

Using a gas power heater to warm a room --> </span>Chemical potential energy transformed into thermal energy 
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3 0
3 years ago
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lianna [129]
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7 0
3 years ago
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A 1000-kilogram car traveling due east at 15 meters per second hit from behind and receives a forward impulse of 6000 newton-sec
strojnjashka [21]

The change in momentum of the car is 6000 kg m/s

Explanation:

According to the impulse theorem, the change in momentum of an object is equal to the impulse exerted on the object, therefore:

\Delta p = I

where

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I is the impulse exerted

For the car in this problem, the impulse received is

I = 6000 kg m/s (in the forward direction)

Therefore, the change in momentum of the car is equal to this value:

\Delta p = I = 6000 kg m/s (in the forward direction)

We can also calculate what is the new momentum of the car. In fact, the initial momentum is

p_i = mu = (1000 kg)(15 m/s)=15,000 kg m/s

And  so, the new momentum is

p_f = p_i + \Delta p = 15,000 + 6,000 = 21,000 kg m/s

Learn more about impulse and momentum:

brainly.com/question/9484203

#LearnwithBrainly

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MAXImum [283]

Answer:

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Explanation:

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8 0
3 years ago
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