Center of Mass: In the figure, four point masses are placed as shown. Assume that all the numbers in the figure are accurate to two significant figures. What are the x and y coordinates of the center of mass (or center of gravity) of this arrangement?
A. (2.2 m, 2.6 m)
B. (2.2 m, 2.7 m)
C. (2.3 m, 2.6 m)
D. (2.3 m, 2.7 m)
E. (2.3 m, 2.8 m)
Answer: E
You might also like to view...
Auroras near the poles of the planets
a. are found on Earth. b. are found on Jupiter. c. indicate the presence of a magnetic field. d. occur when particles in the solar wind hit a planet’s atmosphere. e. all of the above.
A mirror has a hole cut in it so that a light can shine through. Opposite the mirror is another mirror, which is parallel to the first. The light ray hits the second mirror with angle ?1, is reflected at an angle ?2 , and then is incident on the first mirror at angle ?3. At what angle to the normal, ?3, in terms of ?1, will the reflected ray then impact the first mirror?
1. ?/2 – ?1 2. ?1 3. ?/2 + ?1 4. –?1
A large block of wood and a smaller block of iron on weighing scales both register 1 ton. Taking buoyancy of air into account, which has the greater mass?
A) wood B) iron C) both have the same mass. D) need more information
A suitable electric pump in an electric circuit is a
A) chemical battery. B) generator. C) both of these D) neither of these