A 2.0-kg mass is projected vertically upward from ground level with an initial speed of 30 m/s. The mass rises to a maximum height of 35 m above ground level. What is the change in mechanical energy of the mass caused by air resistance between the point of projection and the point of maximum height?
a. ?0.21 kJ
b. ?0.47 kJ
c. ?0.40 kJ
d. ?0.34 kJ
e. ?0.69 kJ
a
You might also like to view...
If you wish to spear a red fish with a red laser beam, you should compensate for refraction and aim your laser
A) directly at the sighted fish. B) above the sighted fish. C) below the sighted fish.
A planet with its rotation axis tilted by 40 degrees relative to its orbital plane aroundits star would:
a) have dark all the time on the South pole during its winter b) have shorter days and nights than those of Earth c) have longer years than those of Earth d) have longer days and nights than those of Earth e) have dark all the time on the North pole during its summer
While both Ptolemy and Copernicus assumed all orbits were ________, Kepler's first law corrected this and made planetary motion predictable
Fill in the blank(s) with correct word
A series RLC circuit has a 100-? resistor, a 0.100-?F capacitor and a 2.00-mH inductor connected across a 120-V rms ac voltage source operating at (1000/?) Hz. What is the resonant frequency of this circuit?
A) 70.7 kHz B) 17.9 kHz C) 22.5 kHz D) 35.3 kHz E) 11.3 kHz