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Chapter 5: Q. 13 (page 127)
Is it possible for the friction force on an object to be in the direction of motion? If so, give an example. If not, why not?
Yes, It is possible.
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In lab, you propel a cart with four known forces while using an
ultrasonic motion detector to measure the cart鈥檚 acceleration. Your data are as follows:
a. How should you graph these data so as to determine the mass of the cart from the slope of the line? That is, what values
should you graph on the horizontal axis and what on the
vertical axis?
b. Is there another data point that would be reasonable to add,
even though you made no measurements? If so, what is it?
c. What is your best determination of the cart鈥檚 mass?
how two of the three forces acting on an object in equilibrium. Redraw the diagram, showing all three forces. Label the third force .
For an object starting from rest and accelerating with constant acceleration, distance traveled is proportional to the square of the time. If an object travels 2.0 furlongs in the first 2.0 s, how far will it travel in the first 4.0 s?
Your friend went for a loop-the-loop ride at the amusement
park. Her car is upside down at the top of the loop.
Two rubber bands cause an object to accelerate with acceleration
a. How many rubber bands are needed to cause an object with
half the mass to accelerate three times as quickly?
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