A 1.0-g bead is at (-2.0 cm, 2.0 cm), a 2.0-g bead is at (2.0 cm, -4.0 cm), and a 3.0-g bead is at (2.0 cm, 0.0 cm). What are the coordinates of the center of mass of this system of beads?
What will be an ideal response?
1.3 cm, -1.0 cm
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Constant Acceleration Kinematics: A certain test car can go from rest to 32.0 m/s in 3.88 s. The same car can come to a full stop from that speed in 4.14 s. What is the ratio of the magnitude of the starting acceleration to the stopping acceleration?
A. 0.937 B. 1.07 C. 0.878 D. 1.14
A steam engine is operating at its theoretical maximum efficiency of 60%. If the waste heat has a temperature of 100°F (38°C), what is the temperature of the boiler?
a. 350°C b. 94°C c. 225°C d. 504°C e. 775°C
If a person weighs 108 lb on Earth, that person's weight on the Moon would be
a. 648 lb. b. 54 lb. c. 18 lb. d. 108 lb. e. 54 lb.
The block shown is pulled across the horizontal surface at a constant speed by the force shown. If M = 5.0 kg, F = 14 N and ? = 35°, what is the coefficient of kinetic friction between the block and the horizontal surface?
a.
0.44
b.
0.33
c.
0.38
d.
0.28
e.
0.17