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3 years ago

5. A car accelerates from rest down a highway at 6 m/s2 for 5 seconds. What distance did the car travel during acceleration?

Physics

1 answer:

Ivenika [448]3 years ago

6 0

Answer:75m

Explanation: simple kinematics . xo=0 , vo=0

x=xo+vo*t +at*t/2 = 6*5*5/2 =75m

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A car accelerates from 20.0 m/s to 28.0 m/s over a distance of 50.0 m. What is the car’s acceleration?

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Answer:

Explanation:

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A balloon is filled with a gas at 111 kPa when the temperature was 22*C. If the temperature

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119.7kPa

Explanation:

Given parameters:

Pressure of gas in balloon = 111kPa

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Final temperature = 45°C

Unknown:

Final pressure = ?

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Since the gases in the balloon have the same number of moles. We can apply a derivative of the combined gas law to solve this problem.

At constant volume the pressure of a given mass of gas varies directly with the absolute temperature.

$\frac{P1}{T1} = \frac{P2}{T2}$

P1 is the initial pressure

P2 is the final pressure

T1 is the initial temperature

T2 is the final temperature

convert from celcius to kelvin:

tK = 273 + tC

T1 = 273 + 22 = 295K

T2 = 273 + 45 = 318K

$\frac{111}{295} = \frac{P2}{318}$

P2 = 119.7kPa

learn more:

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