Angular momentum dimensions: MCQ with Answer and Explanation

Explanation:
The area under the curve of a velocity-time graph represents the total displacement covered by an object in a given time interval. Since velocity = displacement/time, the product of velocity and time (the area) yields displacement. The slope of a velocity-time graph, conversely, represents acceleration.

Explanation:
Speedometer measures instantaneous speed of vehicle. Odometer measures distance travelled. Anemometer wind speed. Barometer pressure.

Explanation:
Electrostatic force acts between charges at a distance without contact. Gravity, magnetic force also non-contact. Friction and normal require contact.