You drop a baseball from a height of 10 meters. a. What\'s its final velocity wh

Question

You drop a baseball from a height of 10 meters. a. What's its final velocity when it hits the ground? b. At the same time you drop the baseball, your friend drops a bowling ball (m_bowling ball >> m_base ball) from the same height. What's its final velocity when it hits the ground? c. Does one of these objects have more inertia than then other? If so, which? d. Does one of these objects feel a greater force than then other? If so, which? e. Use Newton's 2^nd law to explain how your answers in parts c and d are consistent with you answers in parts a and b.

Explanation / Answer

4. initial height of the baseball, h = 10 m
a. Initial velocity, u = 0
final velocity = v
2*g*h = v^2 - u^2
v = 14 m/s
b. as the final velocity is independent of the mass of the object, the bowling ball has the same final velocity when it reaches the ground
c. Yes, the heavier body has more inertia
d. Yes, the heavier object feels greater force than the other one, as F = Mg ( directly proportional to the masss)
e. Now, if final velocity is same, then acceleration should be the same even though forces on the masses are different, which can be shown because
F= mg
but a = mg/m = g [ hence independent of the mass]

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