Force = (mass) x (acceleration).
We know the force and the mass, so we can write
6,000 N = (1,200 kg) x (acceleration).
Divide each side by 1,200 kg:
Acceleration = 6000N/1200kg = 5 m/s² .
That's the acceleration. The car's speed changes by 5 m/s each second
that the force acts on it. If the force pushes from behind, then the car goes
5 m/s faster every second. If the force pushes from in front, then the car
goes 5 m/s slower every second.
The car is moving at 10 m/s and we want to slow it down to zero m/s. So
the force has to push from the front, and it will take (10/5) = <em>2 seconds</em> to
complete the job.
186282 miles. Hope it helps
(a) 7.9 s
The period of a wave is time that passes between two consecutive crests (or two consecutive troughs).
In this case, we are told that five crests pass in a time of 39.5 s. Therefore we can find the period by using the proportion:
Where T is the period. Re-arranging the equation, we find
(b) 0.127 Hz
The frequency of a wave is equal to the reciprocal of the period:
where
f is the frequency
T is the period
For this wave, we have T = 7.9 s, so its frequency is
(c) 37.9 m
The wavelength of a wave is the distance between two consecutive crests (or two consecutive troughs). For this wave, the distance between two successive crests is 37.9 m, so the wavelength of the wave is
(d) 4.81 m/s
The speed of a wave is given by
where
is the wavelength
f is the frequency
For the wave in the problem, we have
Therefore, the speed of the wave is
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Answer:
positively
Explanation:
Because there is and absolute number so no matter the they accelerate backwards or forwards, they will still be traveling away at an positive number.
