Physics Review QuestionUnit:
MECHANICSYear:
1993 Question#:
5Question:
AN OBJECT ACCELERATES UNIFORMLY FROM REST TO A SPEED OF 50. METERS PER SECOND IN 5.0
SECONDS. THE AVERAGE SPEED OF THE OBJECT DURING THE 5.0-SECOND INTERVAL IS(1
) 5.0 m/s(2
) 10. m/s(3
) 25 m/s(4
) 50. m/sWhat is this question really asking?
Explanation by: DIANA L. [ Return to question menu
]Answer 1
5.0 m/s INCORRECT You are looking for the average velocity. Since the acceleration is uniform, the avg velocity is just the avg of the initial and final velocities. return to top
Answer 2
10. m/s INCORRECT CHECK YOUR MATH! You are looking for the average velocity. Since the acceleration is uniform, the avg velocity is just the avg of the initial and final velocities. return to top
Answer 3
25 m/s CORRECT avg v = (v _{f} + v_{i}) /2=(50 m/s +0 m/s) /2 =25 m/s return to top
Answer 4
50. m/s INCORRECT CHECK YOUR MATH! You are looking for the average velocity. Since the acceleration is uniform, the avg velocity is just the avg of the initial and final velocities. return to top
What's this question really asking?
WHAT IS THE AVERAGE VELOCITY OF THE OBJECT? return to top |

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