A Ball of Relatively Low Density Is Thrown Upwards

question 49

Multiple Choice

A ball of relatively low density is thrown upwards.Because of air resistance the acceleration while traveling upwards is −10.8 m/s².On its trip downward the resistance is in the opposite direction,and the resulting acceleration is −8.8 m/s².When the ball reaches the level from which it was thrown,how does its speed compare to that with which it was thrown?

• A)It is greater than the original speed upward.
• B)It is the same as the original speed upward.
• C)It is less than the original speed upward.
• D)Without knowing the original speed,this problem cannot be solved.

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Definitions:

Secondary Alkyl Halide

An organic compound in which a halogen atom is bonded to a secondary carbon, i.e., a carbon atom connected to two other carbon atoms.

Dichlorination Products

The chemical compounds resulting from the addition of two chlorine atoms to another molecule, often used in the context of organic chemistry reactions.

Free Radical Chlorination

A reaction that involves the substitution of hydrogen atoms in hydrocarbons with chlorine atoms through a free radical mechanism.

Monobromination Products

Products resulting from the substitution of a single hydrogen atom in an organic molecule with a bromine atom.