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Anna007 [38]
3 years ago
15

A cyclist accelerates at a rate of 7m/s2. How long will it take the cyclist to reach a speed of 18m/s

Physics
1 answer:
notsponge [240]3 years ago
8 0
43.3m/s that is because the cyclist will be
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A jet starts at rest at the end of a runway and reaches a speed of 80 m/s in 20 s. What is its acceleration?
ahrayia [7]

Answer:

Acceleration=velocity/time.

=80/2=40m/s^2.

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A person who has a job that requires working all night and sleeping during the day will end up fighting hos or her natural
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A drag racer starts from rest and accelerates at 7.4 m/s2. How far will he travel in 2.0 seconds?
Leto [7]

Using the kinematic equation below we can determine the distance traveled if t=2, a=7.4m/s^2.  First we must determine the final velocity:

v_{final}=v_{initial}+\frac{1}{2}at\\\\v_{final}=0+(7.4m/s^2)(2s)=34.8m/s

Now we will determine the distance traveled:

v_{final}^2=v_{initial}^2+2a \Delta x\\\\\Delta x = \frac{v_{final}^2}{2a} =\frac{(34.8)^2}{(2)(7.4)}=81.83 m

Therefore, the drag racer traveled 81.83 meters in 2 seconds.

3 0
3 years ago
Infer why the doppler effect can or can not occur in all waves.
Darya [45]

Answer:

it can occur in all waves because all wave have a frequency

8 0
3 years ago
An enormous thunderstorm covers Dallas-Ft. Worth. Your best friend Clark is a storm chaser and heads to the center of the storm
Rus_ich [418]

Answer:

t = 0.437 s

Explanation:

The speed of sound is a constant that is worth v = 343 m / s

           v = d / t

            t = d / v

the time it takes for the sound to reach Clark at d = 150 m is

           t = 150/343

           t = 0.437 s

This same sound takes much longer to reach you

          t₂ = 127 10³/343

          t₂ = 370 s

6 0
3 years ago
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