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:

Selling Price

The amount of money for which a product or service is sold to the purchaser.

Trade Discount

A reduction on the list price granted by a seller to a buyer based on the quantity purchased or the buyer's trade status.

Net Price

The actual price that is paid for a product or service after deducting any discounts, rebates, or other adjustments.

Discount

A reduction applied to the regular price of goods or services, often used as a sales strategy.