A particularly scary roller coaster contains a loop-the-loop in which the car and rider are completely upside down
If the radius of the loop is with what minimum speed must the car traverse the loop so that the rider does not fall out while upside down at the top? Assume the rider is not strapped to the car. A) 11.4 m/s
B) 12.5 m/s
C) 10.1 m/s
D) 14.9 m/s
A
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Vision Problems: The power of a lens is 4.0 diopters and its diameter is 5.0 cm. What is the focal length of this lens?
A. 25 cm B. 55 cm C. 10 cm D. 0.25 cm E. 2.5 cm
Which of the following statements is true?
A) Both the Northern and Southern hemispheres receive the same amount of sunlight on the equinoxes. B) The Southern Hemisphere receives the most direct sunlight on the summer solstice. C) The Northern Hemisphere receives the most direct sunlight on the summer solstice. D) Both the Northern and Southern hemispheres receive the same amount of sunlight on the solstices. E) Both A and C are true.
Explain the process through which kinetic energy is conserved in an elastic collision
What will be an ideal response?
A particle (charge = Q) is kept in a fixed position at point P, and a second particle (charge = q) is released from rest when it is a distance R from P. If Q = +2.0 mC, q = ?1.5 mC, and R = 30 cm, what is the kinetic energy of the moving particle after it has moved a distance of 10 cm?
a. 60 kJ b. 45 kJ c. 75 kJ d. 90 kJ e. 230 kJ