Physics Review QuestionUnit:
type the regents category hereYear:
1994 Question#:
10Question:
A car is traveling at a constant speed of 14 m/s along a straight highway. A tree
and a speed limit sign are behind a highway. As it passes a tree, the car starts
to accelerate, the car is accelerated uniformly at 2.0 m/s^{2} until it reaches the speed limit sign, 5.0 sec. later.10. What is the distance between the tree and the sign? (1
) 10m(2
) 25m(3
) 70m(4
) 95mWhat is this question really asking?
Explanation by: Danny A [ Return to question menu
]Answer 1
10m INCORRECT Try using the displacement formula. s=v _{i}i(t)+1/2 (a)(t^{2})
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Answer 2
25m INCORRECT Try using displacement formula. s=v _{i}i(t)+1/2 (a)(t^{2})
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Answer 3
70m INCORRECT Try using the displacement formula. s=v _{i}i(t)+1/2 (a)(t^{2})
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Answer 4
95m CORRECT In this problem you would want to find out the displacement which would mean you would use: s=v _{i}i(t)+1/2 (a)(t^{2})
v_{i} = 14m/s
a = 2m/^{2}
t = 5 seconds
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What's this question really asking?
How many meters between the tree and the sign? return to top |

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