AP Physics 1 Unit 4 Progress Check A and B Answered 2025
One end of a vertical spring is attached to the ground with the other end above the ground such
that the spring is at its equilibrium position. The spring has negligible mass and a spring constant
k0 , as shown in Figure 1. When an object of mass m0 is released from rest above the spring, the
object falls and then makes contact with the top of the spring with a speed v0 , as shown in
Figure 2. The spring then compresses such that the object reaches a position x0 below the
spring's equilibrium position, as shown in Figure 3, where the object comes to rest. The object is
then directed upward by the spring until it is no longer in contact with the spring. The object then
continues upward. The object-spring-Earth system has zero gravitational potential energy at the
吗？还是指某个特定的词或概念
？
instant shown in Figure 2. All frictional forces are considered to be negligible.
When the object is located at the position shown in Figure 3, which of the - (answers)1/2
k0x20−mgx0
After the object reaches the position in Figure 3, the spring pushes the object upward until the
object is no longer in contact with the spring. A graph of the force exerted by the spring on the
object as a function of the position of the object is shown. How much work does the spring do on
the object as it pushes the object upward until the object is no longer in contact with the spring? -
(answers)F0x0/2
Which of the following describes the total mechanical energy of the object-Earth system during
the time in which the object is in the air and the time in which the object is in contact with the
, spring? Assume all frictional forces are considered to be negligible. - (answers)in air- constant
spring- not constant
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
吗？还是指某个特定的词或概念
？
loop? - (answers)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? -
(answers)0 9 36
One end of a vertical spring is attached to the ground with the other end above the ground such
that the spring is at its equilibrium position. The spring has negligible mass and a spring constant
k0 , as shown in Figure 1. When an object of mass m0 is released from rest above the spring, the
object falls and then makes contact with the top of the spring with a speed v0 , as shown in
Figure 2. The spring then compresses such that the object reaches a position x0 below the
spring's equilibrium position, as shown in Figure 3, where the object comes to rest. The object is
then directed upward by the spring until it is no longer in contact with the spring. The object then
continues upward. The object-spring-Earth system has zero gravitational potential energy at the
吗？还是指某个特定的词或概念
？
instant shown in Figure 2. All frictional forces are considered to be negligible.
When the object is located at the position shown in Figure 3, which of the - (answers)1/2
k0x20−mgx0
After the object reaches the position in Figure 3, the spring pushes the object upward until the
object is no longer in contact with the spring. A graph of the force exerted by the spring on the
object as a function of the position of the object is shown. How much work does the spring do on
the object as it pushes the object upward until the object is no longer in contact with the spring? -
(answers)F0x0/2
Which of the following describes the total mechanical energy of the object-Earth system during
the time in which the object is in the air and the time in which the object is in contact with the
, spring? Assume all frictional forces are considered to be negligible. - (answers)in air- constant
spring- not constant
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
吗？还是指某个特定的词或概念
？
loop? - (answers)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? -
(answers)0 9 36
