Energy Conservation With Conservative Forces: Two objects, one of mass m and the other of mass 2m, are dropped from the top of a building. If 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.
Answer: B
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Spherical Mirrors: An object that is 2.0 cm tall is placed at the center of curvature in front of a concave mirror. How tall is its image?
A. 0.50 cm B. 1.0 cm C. 1.5 cm D. 2.0 cm E. infinite
The law of conservation of momentum applies to a collision between two bodies since
a. they exert equal and opposite forces on each other. b. they exert forces on each other respectively proportional to their masses. c. they exert forces on each other respectively proportional to their velocities. d. they exert forces on each other respectively inversely proportional to their masses. e. their accelerations are proportional to their masses.
An object is in free fall as soon as it is released, whether it is dropped from rest, thrown downward, or thrown upward
Indicate whether the statement is true or false
Earth's albedo is ______________
Fill in the blank(s) with correct word