When an object is falling through the air, and before it reaches terminal veloci

Question

When an object is falling through the air, and before it reaches terminal velocity, what can we say about its acceleration? (No do not ignore air resistance in this question). a) It equals zero b) It is changing c) It is at a constant value of 9.8 m/s^2 downwards 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 d) an elephant Based on the image below (where KE represents kinetic energy, and PE represents gravitational potential energy), how much work done by neoconservative forces as the object slides down? a) 9500 J b) 5000 J c) -4500 J d) -500 J

Explanation / Answer

16. Before reaching terminal velocity, it experiences a net acceleration.

At terminal velocity, net acceleration = 0

option (b) is correct.

17. It depends on square of the radius of the body.

So, an ant has least value and reaches the terminal velocity fastest.

18. 4500-5000 = -500 J

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