Solution Q.1.

What does the speedometer of a car measure?

A. Average speed
B. Average velocity
C. Instantaneous speed
D. Instantaneous velocity


Answer: C

The speed and velocity change over a typical journey
There is no direction given so the quantity is a scalar rather than a vector, i.e. speed rather than velocity.
The speedometer tells you the speed at the instant you are looking at it. It doesn't tell you anything amout the average speed.
The speedometer measures instantaneous speed.

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