PhysicsLAB MCAS Physics Exams
MCAS 2005 Session 1

The illustration below shows a 2-ton elephant balancing on a tree stump.
 
 
Which of the following statements must be accurate?



 
Which of the following describes how a microwave oven heats food?



 
A recycling plant manager needs to melt 1500 kg of scrap copper to sell to a wire manufacturer. The copper is at 15°C and its melting point is 1083°C. The copper has a specific heat of 385 J/kg • K. How much heat is required to raise the temperature of the copper to its melting point?
 
Each of the following illustrations shows the movement of a 1 kg object. Which of these is an example of simple harmonic motion?



 
Which of the following describes an object that must have a net negative charge?



 
A 1500 kg car increases its speed by 2 m/s for each second of travel. What is the net force acting on the car?
 
The illustration below represents an experiment in which a hot object is added to a container of water at room temperature.
 
 
The water is continuously stirred while the hot object is immersed in it. Which of the following graphs best shows the temperature changes that follow?



 
An organ pipe produces a musical note with a wavelength of 2.72 m. What is the frequency of this note if the speed of sound is 348 m/s?
 
Students in a physics lab are studying the circuit shown in the diagram below.
 
 
Which of the following options will double the current through the ammeter?
 



 
Two boxes, A and B, both contain the same number of nitrogen gas molecules. The gas molecules in box A have twice the average speed of the molecules in box B. Which of the following best describes the nitrogen gas in box A?



 
 
 
Open-Response Questions
  • BE SURE TO ANSWER AND LABEL ALL PARTS OF THE QUESTION.
  • Show all your work (diagrams, tables, or computations) in your Student Answer Booklet.
  • If you do the work in your head, explain in writing how you did the work.
 
 
Refer to the following information for the next four questions.

The figure below shows a tennis ball bouncing from point 1 to point 5. The tennis ball bounces up from point 1 as shown in the figure to a maximum height labeled as point 2. The ball then bounces a few times. Neglect any horizontal motion.
 
a. Describe the kinetic and gravitational potential energy changes of the ball that occur between points 1 and 2. 

b. Describe the kinetic and gravitational potential energy changes of the ball that occur between points 2 and 3. 

c. Compare the kinetic energy of the ball at points 3 and 4. 

d. The tennis ball has less energy at point 5 than it had at point 3. Explain what happened to the energy the ball had at point 3. 





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