Physics chapter 5,6,7 exam review
Study online at https://quizlet.com/_cymt8a
1. After their rocket engines shut off, astronauts experience weightlessness in
the orbiting Space Shuttle,
a) but they cannot accelerate because their rocket engines are shut off
b) and they are accelerating because they are actually in free fall
c) and they are accelerating because they have constant velocity as they pass
overhead
d) but they are not accelerating, since nothing in space actually has weight: b)
and they are accelerating because they are actually in free fall
2. An object undergoes uniform circular motion. Which pair of vectors is
perpendicular?
a) Its centripetal acceleration and the centripetal force
b)Its centripetal acceleration and velocity vectors
c) all three vectors are mutually perpendicular: centripetal acceleration, cen-
tripetal force, and velocity.: b)Its centripetal acceleration and velocity vectors
3. Six identical blocks of steel, each with mass 10.0 kg, are taken to the Moon.
On the Moon, their combined mass is
a) zero
b) 360 kg
c) 10.0 kg
d) 60.0 kg: d) 60.0 kg
4. A cyclist races around a circular track at the constant speed of 20 m/s. The
radius of the track is 40m. The centripetal acceleration of the cyclist is
a) 20 m/s^2, in the direction of travel.
b) 10 m/s^2,
c) Zero
d) 10 m/s, toward the center of the track: d) 10 m/s, toward the center of the track
5. A ball is whirled on the end of a string in a horizontal circle at constant
speed. Suddenly the string breaks. Immediately after the string breaks, the
ball will,
a) have a horizontal velocity partly in away from the center of the circle and
partly tangent to the circle
b) have a horizontal velocity toward the center of the circle
c) have a horizontal velocity that is tangental to the circle
d) have no horizontal velocity
e) have a horizontal velocity away from the center of the circle: c) have a
horizontal velocity that is tangental to the circle
6. what are the units for the constant G used in Newton's law of universal
gravitation?
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Study online at https://quizlet.com/_cymt8a
1. After their rocket engines shut off, astronauts experience weightlessness in
the orbiting Space Shuttle,
a) but they cannot accelerate because their rocket engines are shut off
b) and they are accelerating because they are actually in free fall
c) and they are accelerating because they have constant velocity as they pass
overhead
d) but they are not accelerating, since nothing in space actually has weight: b)
and they are accelerating because they are actually in free fall
2. An object undergoes uniform circular motion. Which pair of vectors is
perpendicular?
a) Its centripetal acceleration and the centripetal force
b)Its centripetal acceleration and velocity vectors
c) all three vectors are mutually perpendicular: centripetal acceleration, cen-
tripetal force, and velocity.: b)Its centripetal acceleration and velocity vectors
3. Six identical blocks of steel, each with mass 10.0 kg, are taken to the Moon.
On the Moon, their combined mass is
a) zero
b) 360 kg
c) 10.0 kg
d) 60.0 kg: d) 60.0 kg
4. A cyclist races around a circular track at the constant speed of 20 m/s. The
radius of the track is 40m. The centripetal acceleration of the cyclist is
a) 20 m/s^2, in the direction of travel.
b) 10 m/s^2,
c) Zero
d) 10 m/s, toward the center of the track: d) 10 m/s, toward the center of the track
5. A ball is whirled on the end of a string in a horizontal circle at constant
speed. Suddenly the string breaks. Immediately after the string breaks, the
ball will,
a) have a horizontal velocity partly in away from the center of the circle and
partly tangent to the circle
b) have a horizontal velocity toward the center of the circle
c) have a horizontal velocity that is tangental to the circle
d) have no horizontal velocity
e) have a horizontal velocity away from the center of the circle: c) have a
horizontal velocity that is tangental to the circle
6. what are the units for the constant G used in Newton's law of universal
gravitation?
1/3
