Based on their mass and cross-sectional area, which of the following animals rea

Question

Based on their mass and cross-sectional area, which of the following animals reaches its terminal velocity value the fastest (takes least time to get to its terminal velocity)?

a) an ant

b) a bird

c) a human

c) an elephant

When the force of air drag is NOT taken into account, what can you say about the system?

a) mechanical energy is conserved , b) mechanical energy is not conserved, c) kinetic energy is conserved, d) potential energy is conserved

When the force of air drag is taken into account, what can you say about the system?

a) energy is conserved, b) kinetic energy is conserved, c)potential energy is conserved, d)spring energy is conserved

Explanation / Answer

1- all of them reaches the terminal velocity at the same time if the air drag is into account

2- mechanical energy is conserved

3- energy is conserved

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