Consider the force by a baseball against a player's glove while the player is catching a fastball. The law of force pairs says that this force is one of a pair of forces. The other member of this pair is
A) the player's grip on the glove, i.e., the force by the player's hand against the glove.
B) the weight of the ball.
C) the muscular force in the player's arms, i.e., the force by the player's muscles on the player's arm.
D) the frictional force by the ground on the player's shoes.
E) the force by the glove on the ball.
E
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The planets all lie in nearly the same plane resulting in a disk-like structure for the solar system. This disk-like structure is believed to exist because
a. the solar nebula from which the planets formed had a disk-like structure. b. the bipolar flow from the young Sun cleared all material out of the nebula except that in the disk. c. Jupiter's gravity was great enough to pull all of the other planets to the plane of its orbit. d. the Milky Way Galaxy from which the planets condensed has a disk-like structure
A string with a mass per length of 2.00 gm/m is stretched with a force of 150 N between two points that are 0.500 m apart. The frequency of the second mode of the stretched string is in tune with the fundamental frequency of an organ pipe filled with air and open at both ends. The velocity of sound in air at 0
is 331 m/s. What is the length of the organ pipe?
A. 43.6 cm B. 40.1 cm C. 37.5 cm D. 35.6 cm E. 30.2 cm
If the collision is completely inelastic, how many quantities suffice to determine the system’s final state?
A. Zero B. One C. Two D. Three E. Four
During the Apollo flights to the Moon a well-known TV newscaster made the following statement, "The Apollo space craft is now leaving the gravitational force of Earth." This statement is incorrect. He should have said that the space craft
A. was attracted only by the Moon. B. was attracted only by the Sun C. was attracted more by the Moon than by Earth. D. entered a region of space where there were no