Two objects, one of mass m and the other of mass 2m, are dropped from the top of a building. Assuming there is no air resistance, when they hit the ground
A) both will have the same kinetic energy.
B) the heavier one will have twice the kinetic energy of the lighter one.
C) the heavier one will have four times the kinetic energy of the lighter one.
D) the heavier one will have half the kinetic energy of the lighter one.
E) the heavier one will have one-fourth the kinetic energy of the lighter one.
B
You might also like to view...
A torque of 15.0 N•m is applied to a bolt. The bolt rotates through an angle of 360 degrees. The work done in turning the bolt is
A. 94.2 J. B. 91.3 J. C. 96.7 J. D. 89.9 J. E. 98.1 J.
Based on everything we have learned about Venus and Mars, what is the most surprising aspect of Earth's climate history?
A) the fact that the temperature of our planet has remained relatively steady throughout our planet's history B) the fact that Earth apparently got a lot of atmospheric gas from outgassing by volcanoes C) the fact that Earth had enough water to form oceans D) the fact that Earth's climate can be affected by changes in its axis tilt
Which is the latest stage (of those given below) in the evolution of a star?
A) red giant B) white dwarf C) protostar D) geodesic E) supernova
At what speed would a clock have to be moving in order to run at a rate that is one-third the rate of a clock at rest?
a. 0.97c c. 0.87c b. 0.75c d. 0.94c