A particle moves along a circular path having a radius of 2.0 m. At an instant when the speed of the particle is equal to 3.0 m/s and changing at the rate of 5.0 m/s2, what is the magnitude of the total acceleration of the particle?
A. 7.5 m/s2
B. 6.0 m/s2
C. 5.4 m/s2
D. 6.7 m/s2
E. 4.5 m/s2
Answer: D
You might also like to view...
Which of the following is not a good reason to place an observatory on a remote mountain to?
A) reduce the impact of light pollution B) reduce the twinkling caused by Earth's atmosphere C) allow study of infrared light D) allow observations at ultraviolet and x-ray wavelengths
The fact that the life on Earth seems to have appeared quite rapidly suggests that life
A) can arise on most habitable worlds B) can only appear soon after a planet forms C) on any kind of planet is inevitable D) is only possible on Earth-like planets
Spectrographic analysis of light from a distant galaxy shows that the galaxy is receding from Earth at v = 0.384 c. Use Hubble's law with H = 17 km/s/106 lightyears to estimate the distance to the galaxy
a. 3.3 × 10^8 lightyears b. 6.8 × 10^9 lightyears c. 9.9 × 10^8 lightyears d. 2.2 × 10^9 lightyears e. 6.5 × 10^6 lightyears
Carbon-14 has a half-life of 5730 y. A sample of wood has been recovered by an archaeologist. The sample is sent to a laboratory,
where it is determined that the activity of the sample is 0.144 Bq/g. By comparing this activity with the activity of living organic matter, 0.230 Bq/g, the scientist determines how old the wood sample is, or more precisely, when the tree that the sample came from died. How old is the sample of wood? A) 2940 y B) 3870 y C) 2630 y D) 4250 y E) 4590 y