This is a trick question, isn't it? If a car is stuck in traffic, it doesn't matter how fast it can travel, because it isn't moving at all. Therefore the average speed would be zero, right?
Answer:
The velocity must change but not speed.
Explanation:
- Velocity is defined as the displacement by time. Whereas speed is expressed as the distance between two successive positions of the body to the time interval it took to travel.
<em>Velocity, V = D / t m/s</em>
<em> Speed, s = d /t m/s </em>
- Velocity is a vector quantity that has a magnitude and direction.
- The speed is a scalar quantity having only the magnitude.
- At any instant of time, the magnitude of the velocity is always equal to the magnitude of the speed. The magnitude of velocity, |<em>v </em>| = magnitude of speed, |<em>v </em>|. The magnitude is always positive
- The acceleration of a body is defined as the rate of change of velocity to time.
<em> a = (v - u) / t m/s²</em>
- If a body is accelerating, It varies its velocity with respect to time.
- In case of uniform circular motion, the speed remains constant, but the velocity changes continuously.
So, in the case of circular motion if an object accelerates, velocity must change but speed remains constant.
Answer:
<h2>Letter which represent the resistance in this circuit diagram is</h2><h2>D</h2>
Explanation:
Here in this circuit diagram we know that
A = Battery
B = switch
C = connecting Wire
D = Resistance
This zig zag shape is represented as Resistance in all circuits
