Physicshard · Past Paper
If air resistance is not negligible, the total mechanical energy of a falling body:
AIncreases
BDecreases
CRemains constant
DBecomes zero immediately
✓ Correct Answer: B — Decreases
Air resistance is a non-conservative force that converts part of the mechanical energy into heat energy.
Share this question
More from Physics
- The change in direction of a ray of light when it enters from a rarer medium to a denser medium is:
- A volt-meter is always connected in ________ with the component to measure potential difference.
- The velocity of light in two media A and B are 2x10^8 m/s and 2.5x10^8 m/s. The critical angle for light going from A to B is:
- The potential difference across a 10 Ohm resistor is 50 V. How many electrons pass through the resistor in 2 seconds?
- A balloon filled with helium rises in the air because: