Physics Review Question

Unit: type the regents category here
Year: 1993 Question#: 13
Question: A student rides a bicycle up a 30.° hill at a constant speed of 6.00 meters per second. The combined mass of the student and bicycle is 70.0 kilograms. What is the kinetic energy of the student-bicycle system during this ride?

(1 ) 210. J
(2 ) 420. J
(3 ) 1,260 J
(4 ) 2,520 J

What is this question really asking?






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Answer 1
210. J

INCORRECT

In order to get this answer you probably started with the right formula KE = 0.5 m v2 but then forgot to square the 6.00 m/s velocity. return to top























Answer 2
420. J

INCORRECT

To get this answer you probably just multiplied velocity times mass and forgot about actually using the formula for kinetic energy. return to top



























Answer 3
1,260 J

CORRECT

In order to get this answer you must have started with the right formula KE = 0.5 m v2 and correctly chose to ignore the agle you were given which was an unnecessary piece of indformation. return to top


























Answer 4
2520 J

INCORRECT

In order to get this answer you probably started with the right formula KE = 0.5 m v2 but then forgot to multiply by one half. return to top








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