Science Bowl Practice Questions

Physics - 13

78.

Multiple Choice: The time needed for a net force of 10 newtons to change the velocity of a 5 kilograms
mass by 3 meters/second is:

w) 1.5 seconds
x) 6 seconds
y) 16.7 seconds
z) 150 seconds

ANSWER: W -- 1.5 SECONDS

79.

Multiple Choice: The value of G, the universal gravitational constant, was measured experimentally
by:

w) Newton
x) Cavendish
y) Copernicus
z) Kepler

ANSWER: X -- CAVENDISH

80.

Multiple Choice: Two steel balls are at a distance S from one another. As the mass of ONE of the balls
is doubled, the gravitational force of attraction between them is:

w) quartered
x) halved
y) doubled
z) quadrupled

ANSWER: Y -- DOUBLED

81.

Multiple Choice: If the distance between the earth and moon were halved, the force of the attraction
between them would be:

w) one fourth as great
x) one half as great
y) twice as great
z) four times as great

ANSWER: Z -- FOUR TIMES AS GREAT

82.

Multiple Choice: As a 10 kilogram mass on the end of a spring passes through its equilibrium position,
the kinetic energy of the mass is 20 joules. The speed of the mass is:

w) 2.0 meters per second
x) 4.0 meters per second
y) 5.0 meters per second
z) 6.3 meters per second

ANSWER: W -- 2.0 METERS PER SECOND

83.

Multiple Choice: As a longitudinal wave moves through a medium, the particles of the medium:

w) vibrate in a path parallel to the path of the wave
x) vibrate in a path perpendicular to the path of the wave
y) follow the wave along its entire path
z) do not move

ANSWER: W -- VIBRATE IN A PATH PARALLEL TO THE PATH OF THE WAVE

84.

Multiple Choice: As a pendulum is raised to higher altitudes, its period: