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8. Doug is investigating motion by rolling tennis balls across the floor.What does he need to know in order to determine the velocity of atennis ball?A speed and directionBtime and distanceCforce and motionDmass
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37 votes
8. Doug is investigating motion by rolling tennis balls across the floor.What does he need to know in order to determine the velocity of atennis ball?A speed and directionBtime and distanceCforce and motionDmass and size

User RoduanKD
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1 Answer

20 votes
20 votes

The velocity of an object is described as the distance traveled by the object per unit time and the direction of the motion of object.

Thus, only distance and time cannot describe the velocity of the tennis ball.

The direction of the tennis ball is also required.

Hence, the option A is the correct answer.

User Jop Knoppers
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3.0k points
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