Answer:
The net force on a car traveling around a curve is the centripetal force, Fc = m v2 / r, directed toward the center of the curve.
For a level curve, the centripetal force will be supplied by the friction force between the tires and roadway.
A banked curve can supply the centripetal force by the normal force and the weight without relying on friction.
Explanation:
Answer:

Explanation:
Given:
- original frequency of sound wave,

- speed of the sound source,

- original speed of sound wave from the source,

<u>According to the Doppler's effect:</u>

The sound is reflected from the wall and the source is moving towards the wall and observer is also riding the same source.
The velocity of the observer,


<u>Answer:</u>
I think its
<em>10 kg</em>
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The car's velocity is. 60 km/hr west.