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PHYS1303 READING QUIZ 16
1. An arrow is launched straight up from the surface of the Earth. Which one of the following statements
describes the energy transformation of the arrow as it rises? Neglect air resistance.
a) The kinetic energy of the arrow increases and its potential energy decreases.
b) Both the potential energy of the arrow and its total energy increase.
c) The kinetic energy of the arrow decreases as the potential energy increases.
d) Both the kinetic energy of the arrow and its potential energy remain constant.
e) The total energy of the arrow increases.
2. Complete the following statement: The total mechanical energy of a system remains unchanged if
a) the external forces acting on the system are nonconservative.
b) the external forces acting on the system are conservative.
c) the kinetic energy is constant.
d) the potential energy is constant.
e) there are no external forces acting on the system.
3. A ball is thrown vertically upward in the air. Which one of the following quantities is necessarily equal to
zero at the highest point of the ball’s trajectory?
a) acceleration
b) net force
c) potential energy
d) kinetic energy
e) total mechanical energy
4. Which one of the following situations has a point of neutral equilibrium?
a) a marble on a flat tabletop
b) a pendulum
c) a ball on a hill
d) a block on a vertical spring
e) a horse is jumping over a fence with all four hooves above the ground
5. The graph shows the potential energy as a function of distance for an object moving along the x axis. At
which of the labeled points does the force acting on the object have the largest magnitude?
a) A
b) B
c) C
d) D
e) E