In the figure, a stunt car driver negotiates the frictionless track shown in such a way that the car is barely in contact with the track at the top of the loop
The radius of the track is 9.9 m and the mass of the car is 1800 kg. Find the magnitude of the force of the car on the track when the car is at point A. You can treat the car as a point mass.
What will be an ideal response?
Answer: 53,000 N
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Equilibrium: A 30.0-kg load is being held in place using massless wires in the ideal pulley arrangement shown in the figure. What is the magnitude of the force F?
Fill in the blank(s) with the appropriate word(s).
When we speak of the large-scale structure of the universe, we mean
A) the overall arrangement of galaxies, clusters of galaxies, and superclusters in the universe. B) the structure of any large galaxy. C) the structure of any individual cluster of galaxies. D) the overall shape of the observable universe.
A 10-cm focal length converging lens is used to magnify small newspaper print 2.0 mm high. Calculate the height of the image (in mm) for the maximum magnification for a normal eye.
A. 3.5 B. 7.0 C. 9.2 D. 12 E. 2.5
The cluster of galaxies that includes our Milky Way is called the _______________
a. Local Group b. universe c. solar system d. Milky Cluster