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Physics SLO Test Review | 103 Questions with100% Correct Answers | Verified.
The SI unit of length, the meter, is currently defined - -as the length of the path traveled
by light in a vacuum during 1/2999792485 s.
-The SI unit of mass, the kilogram, is currently defined - -by a prototype platinum-
iridium cylinder kept at the International Bureau of Weights and Measures in Sevres,
France.
-The SI unit of time, the second, is currently defined by - -a duration of an atomic clock
-Which of the following is a megawatt? - -10^6 W
-Which of the following is a microsecond? - -10^-6 s
-How many significant figures are in 0.0037010? - -five
-All of the following are vectors, except
mass
acceleration
force
velocity
displacement - -mass
-Speed is to velocity as distance is to - -displacement
-Suppose that an object travels from one point in space to another. Make a comparison
between the displacement and the distance traveled - -The displacement is either less
than or equal to the distance travel
-When an object is released from rest and falls in the absence of friction, which of the
following is true concerning its motion? - -Its acceleration is constant
-When a ball is thrown straight up, which of the following is zero at its highest point?
velocity
displacement
acceleration - -velocity
-When a ball is thrown straight up, the acceleration at its highest point is - -downward
-A component of a vector can be greater than the vector's magnitude. - -False
-If A+B = C (all vectors) and A^2 + B^2 = C^2, then the vectors A and B are oriented
perpendicular relative to one another. - -True
, -The magnitude of a unit vector is one. - -True
-The horizontal component of the velocity of a projectile remains constant during the
entire trajectory of the projectile. - -True
-The vertical component of the acceleration of a projectile remains constant during the
entire trajectory of the projectile. - -True
-A car travels east and its velocity decreases. The acceleration of the car is in which of
the following directions? - -Westward
-If the acceleration of an object is always directed perpendicular to its velocity, then - -
the object is turning
-You toss a ball to your friend. When the ball reaches its maximum altitude, its velocity
is - -horizontal
-You hit a tennis ball over a net. When the ball reaches its maximum height, its speed is
- -less than its initial speed
-You toss a ball to a friend. When the ball reaches its maximum altitude, its acceleration
- -is constant
-A force is required for an object to accelerate. - -True
-The acceleration of an object does not have to be in the same direction as the net force
applied to it. - -False
-A force is required to keep an object moving along a horizontal line. - -False
-The mass of an object is fixed, but its weight varies from location to location. - -True
-Your mass on the moon will be about one-sixth of your mass on Earth. - -False
-In the absence of an external force, a moving object will - -move with constant velocity
in a straight
-7) An object is moving with constant velocity in a straight line. Which of the following
statements is true? - -The net force on the object is zero.
-8) If you push a 4-kg mass with the same force that you push a 10-kg mass from rest,
then - -the 4-kg mass accelerates 2.5 times faster than the 10-kg mass.
-lf you exert a force F on an object, the force which the object exerts on you will - -
always be -F
-11) Two toy cars (16 kg and 2 kg) are released simultaneously on an inclined plane that
makes an angle of 30 with the horizontal. Which statement best describes their
acceleration after being released? - -Both cars accelerate at a rate of g sin(30).
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