AP Physics 1 Unit 4 Reviewed Questions And Correct Answers
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AP Physics 1
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AP Physics 1
AP Physics 1 Unit 4 Reviewed Questions And Correct
Answers
A roller coaster track at a park includes a loop of radius R. A cart of mass M is located at the
peak of the track, which has a height of 4R. The cart is subsequently released from rest such that
it can slide down the track and go ar...
AP Physics 1 Unit 4 Reviewed Questions And Correct
Answers
A roller coaster track at a park includes a loop of radius R. A cart of mass M is located at the
peak of the track, which has a height of 4R. The cart is subsequently released from rest such that
it can slide down the track and go around the loop, as shown in the figure above. All frictional
forces are considered to be negligible. Which of the following expressions for the cart's initial
and final kinetic energy KE and the cart-Earth system's initial and final gravitational potential
energy Ug could be used to determine the speed vf of the cart when it reaches the top of the
loop?☑️Correct Ans-Initital Ug0=4MgRUg0=4MgR KE0=0
FInal Ugf=2MgRUgf=2MgR KEf=12mv2f
A block of mass 3kg on a horizontal surface travels at 6m/s toward the free end of a horizontal
spring of negligible mass and spring constant k=200N/m , as shown in the figure. The other end
of the spring is attached to a wall, and there is negligible friction between the block and the
horizontal surface. The block comes into contact with the free end of the spring such that the
block remains fixed to the spring as the spring is compressed. A graph of the kinetic energy of
the block as a function of the distance the spring is compressed is shown that was collected from
experimental data. Which of the following data tables could best represent the spring potential
energy of the block-spring system as a function of the distance that the spring is
compressed?☑️Correct Ans-0 9 36
A student uses a motion detector to record the speed of a 2kg object as a function of time as it
travels across a horizontal surface of negligible friction. Data from the experiment are shown in
the graph. In addition to the known mass, how can a student use the graph to determine the work
done on the object from 0s to 5s ?☑️Correct Ans-Use ΔK=1/2 mΔv^2 with v0 equal to the
speed of the object at 0s and vf equal to the speed of the object at 5s.
, A student must determine the work done on an object when an external force is exerted on it
after it travels a specific distance. An external force F is exerted on an object at position x = 0 by
a string as the object moves a distance D across a horizontal surface for a time tf . The force
changes such that it decreases as the object moves. Which procedure could be used to determine
the work done on the object by the external force?☑️Correct Ans-Use a spring scale that is tied
to the free end of the string and a meterstick to measure the force exerted on the object and the
corresponding position for several positions until the object travels a distance DD . Graph the
force on the vertical axis and the position on the horizontal axis. Determine the area bound by the
curve and the horizontal axis.
An experiment is conducted such that an applied force is exerted on an object as it travels across
a horizontal surface with a constant speed. A graph of the net force exerted on the object as a
function of the object's distance traveled is shown. Which of the following claims is correct
regarding the work done on the object by the applied force from one data point to the next data
point?☑️Correct Ans-The work done remains nearly constant for all displacements.
A block of mass M is placed on a semicircular track and released from rest at point P, which is at
vertical height H1 above the track's lowest point. The surfaces of the track and block are
considered to be rough such that a coefficient of friction exists between the track and the block.
The block slides to a vertical height H2 on the other side of the track. How does H2 compare to
H1?☑️Correct Ans-H2<H1
A block of mass M slides with speed v0 at the bottom of a ramp of negligible friction that has a
height H, as shown. How do the total mechanical energy of the block alone and the total
mechanical energy of the block-Earth system change when the block slides up the ramp to point
P?☑️Correct Ans-mech energy decreases for block
mech energy stays constant for the system
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