PHY 111 Final Test Questions with Verified
Correct Answers
A flatbed truck carrying a light box makes a sharp turn and the box slides off the truck
bed. In what direction will the box slide?
along the tangent to its circular path
A 1.2 kg rock is swung around on a string in a vertical circle with a radius of 0.85 m.
The minimum speed required for the rock at the top of the circle to keep it in it's
circular path is
2.9 m/s
If the distance between two masses is doubled, what happens to the gravitational force
between the masses?
It will be reduced to one quarter (Fg=1(1)(1)/2^2=1/4)
NASA is launching a satellite with mass m into a circular orbit with radius r around the
Earth. The orbit of the satellite is illustrated in the figure below(LOOK AT NOTES).
The velocity, v, of the satellite is shown with the arrow. Consider the following arrows
and directions (AGAIN LOOK AT NOTES)
-Which arrow is in the direction of the net force on the satellite?
D. IV
If a second satellite is placed in a larger circular orbit than the first, how will the speeds
of the satellites compare?
the second satellite must have a smaller speed.
The satellite does not fall down to the earth because
, they have a sufficient horizontal speed to move around the earth instead of falling down,
A student sets up a meterstick resting on a stand at the 80-cm mark and held in place by
a scale attached at the zero cm mark as shown in the figure below(NOTES!)A mass, M,
is then attached to the meter stick at some point between the stand and the scale.
Assume the mass of the meter stick is negligible. The student proceeds to measure the
force, F, shown on the scale for different values of mass M and for different locations of
mass M.
- In an experiment, the student places a mass M at the 20 cm mark and records the
force measured by the scale. When she later slides the same mass to the 60 cm mark,
what will happen to the force measured by the scale?
the force will be reduced to one third.
A student sets up a meterstick resting on a stand at the 80-cm mark and held in place by
a scale attached at the zero cm mark as shown in the figure below(NOTES!)A mass, M,
is then attached to the meter stick at some point between the stand and the scale.
Assume the mass of the meter stick is negligible. The student proceeds to measure the
force, F, shown on the scale for different values of mass M and for different locations of
mass M.
-In an experiment, the student places a 2 kg mass at the 60 cm. Determine the force
measured by the scale
49 N
A heavy mass is suspended on a 10 m long steel cable. As a result the cable stretches 2
cm. If the same mass were to be suspended on a two parallel 10 m long sections of the
same cable, ho much would the cable stretch?
1 cm( NOTES)
Correct Answers
A flatbed truck carrying a light box makes a sharp turn and the box slides off the truck
bed. In what direction will the box slide?
along the tangent to its circular path
A 1.2 kg rock is swung around on a string in a vertical circle with a radius of 0.85 m.
The minimum speed required for the rock at the top of the circle to keep it in it's
circular path is
2.9 m/s
If the distance between two masses is doubled, what happens to the gravitational force
between the masses?
It will be reduced to one quarter (Fg=1(1)(1)/2^2=1/4)
NASA is launching a satellite with mass m into a circular orbit with radius r around the
Earth. The orbit of the satellite is illustrated in the figure below(LOOK AT NOTES).
The velocity, v, of the satellite is shown with the arrow. Consider the following arrows
and directions (AGAIN LOOK AT NOTES)
-Which arrow is in the direction of the net force on the satellite?
D. IV
If a second satellite is placed in a larger circular orbit than the first, how will the speeds
of the satellites compare?
the second satellite must have a smaller speed.
The satellite does not fall down to the earth because
, they have a sufficient horizontal speed to move around the earth instead of falling down,
A student sets up a meterstick resting on a stand at the 80-cm mark and held in place by
a scale attached at the zero cm mark as shown in the figure below(NOTES!)A mass, M,
is then attached to the meter stick at some point between the stand and the scale.
Assume the mass of the meter stick is negligible. The student proceeds to measure the
force, F, shown on the scale for different values of mass M and for different locations of
mass M.
- In an experiment, the student places a mass M at the 20 cm mark and records the
force measured by the scale. When she later slides the same mass to the 60 cm mark,
what will happen to the force measured by the scale?
the force will be reduced to one third.
A student sets up a meterstick resting on a stand at the 80-cm mark and held in place by
a scale attached at the zero cm mark as shown in the figure below(NOTES!)A mass, M,
is then attached to the meter stick at some point between the stand and the scale.
Assume the mass of the meter stick is negligible. The student proceeds to measure the
force, F, shown on the scale for different values of mass M and for different locations of
mass M.
-In an experiment, the student places a 2 kg mass at the 60 cm. Determine the force
measured by the scale
49 N
A heavy mass is suspended on a 10 m long steel cable. As a result the cable stretches 2
cm. If the same mass were to be suspended on a two parallel 10 m long sections of the
same cable, ho much would the cable stretch?
1 cm( NOTES)
