Name ______________________________________________________________________________
Advanced PHYSICS 1 - Second Semester Review - Spring 2016
WORK & ENERGY:
Remember that work = force X distance. If no distance is covered, then no work is done. Energy is the potential to do
work. Kinetic energy (energy in motion) is ½ mv2. Potential energy is stored energy. Total mechanical energy is the
potential + kinetic energy at a given time. The most common type of mechanical potential energy that we dealt with is
gravitational potential energy.
1. How much kinetic energy does a does a 25 kg dog running at 12 m/s have?
2. How much work is done by:
a. Lifting a 3 kg mass from the floor to a table that is 1.2 m tall?
b. Holding a 70 kg mass for 40 minutes?
c. Rolling a 2.5 kg ball up a ramp that is 17 m long and 3 m tall?
d. Applying a 7 N force to stop a bicycle in 13 m?
3. If you are applying a 15 N of force to push a 22 kg lawn mower, how much power would be required to move
it 110 m in 30 s?
4. A ball is thrown straight up in the air and is caught at exactly the same location where it was thrown.
a. When does the ball have the most potential energy?
b. When does it have the most kinetic energy?
c. When does it have the most MECHANICAL energy?
d. When is its acceleration the greatest?
5. If a cat falls off the roof of a two story building that is 20 m high and lands on an awning overlooking the first
floor that is 10 m high, by what factor has its gravitational potential energy changed?
MOMENTUM & IMPULSE:
Momentum is
6. Two railroad carts, A and B are on a frictionless, level track. Cart A has a mass of 3.0 x103 kg and a velocity of
4.0 m/s toward the right. Cart B has a mass of 4.5 x 103 kg and a velocity of 2.5 m/s to the left. When the two
carts collide, they lock together. What is the final speed of the two carts after they collide?
7. If a net force of 20 N acts on a 12.0 kg mass for 16.0 s, what is the total change in momentum of the mass?
8. In a baseball game, a batter hits a ball for a home run. Compared to the magnitude of the impulse imparted to
the ball, the magnitude of the impulse imparted to the bat is ____________.
9. The impulse experienced by a body is equivalent to the body’s change in _________________
10. Hobbes, the stuffed tiger, has a mass of 31.8 kg. Calvin, the little boy, has a mass of 25.1 kg. If Hobbes has a
velocity of 11 m/s, how fast does Calvin need to travel in order to have the same magnitude of momentum?
11. For the following pendulum:
a. At what position(s) is the potential energy greatest?
b. At what position(s) is the kinetic energy the greatest?
c. At what position(s) are the kinetic and potential energies approximately equal?
12. Ball A is in motion and collides with stationary Ball B.
a. The momentum for Ball A ______________ (increases/decreases/stays the same)
b. The momentum for Ball B ______________ (increases/decreases/stays the same)
c. How does this change if A is bigger than B?
d. How does this change if B is bigger than A?
Name ______________________________________________________________________________
ELECTROSTATICS:
13. What are the three methods that a charge can be transferred from one object to another?
14. What is the unit for charge?.
15. What allows anything to be a good conductor?
16. What allows anything to be a good insulator?
17. The distance between two point charges is tripled. Compared to the original force, the new electrostatic force
between the charges is _____________________.
18. What is the magnitude of the force between the two spheres?
CIRCUITS:
19. An electric heater rated at 4,800 watts is operated on 120 volts. What is the resistance of the heater?
Base your answers to the next two (2) questions on the following circuit diagram. A 9.0-volt battery is connected in
series to a 4.0-ohm resistor and a 5.0-ohm resistor as shown in the diagram below.
20. What is the current through the 5 Ω resistor?
21. What is the potential difference across a 2.0 ohm resistor that draws 2.0 coulombs of charge per second?
Base your answers to the next three (3) questions on the diagram below which shows four resistors connected in
parallel to a 110 V DC source and ammeter A in the position indicated.
22. What is the reading of ammeter A?
23. Which resistor has the highest resistance?
24. As the resistance of one branch of a parallel circuit decreases, the potential drop across that branch does
what?
25. In the circuit diagram shown below, ammeter A1 reads 10 amperes.
a. What is the current in A2?
b. What is the current in A3?
c. What is the voltage in the battery?
Name ______________________________________________________________________________
26. For the circuit below:
a.
b.
c.
What is the voltage across the 20 Ω resistor? The 30 Ω resistor? The 60 Ω resistor?
What is the current through the 20 Ω resistor? The 30 Ω resistor? The 60 Ω resistor?
What is the current measured by the current meter A?
27. A light bulb operating at 100 V draws a current of 0.3 A for 240 sec. What is the power rating for the light
bulb?
28. The heating element on an electric stove dissipates 200 W of power when connected to a 60 V source. What
is the electrical resistance?
WAVES
29. A wave generator located 4.0 m from a reflecting wall produces a standing wave in a string, as shown in the
diagram below.
a. How many wavelengths are on the string?
b. What is the length of the wavelength?
c. If the speed of the wave is 10 m/s,
what is its frequency?
Base your answers to the next two (2) questions on the diagram below, which represents waves A, B, C, and D
traveling in the same medium.
30. Which wave has the longest period?
31. Which two waves have the same wavelength?
32. The diagram below shows a periodic wave. Which two points on the wave are in phase?
a.
b.
c.
d.
Which two points on the wave are in phase?
Which two points on the wave are 180° out of phase?
What point represents a crest?
What point represents a trough?
Name ______________________________________________________________________________
33. The diagram below shows two pulses, each of length , traveling toward each other at equal speed in a rope.
Which diagram best represents the shape of the rope when both pulses are in region AB? Which two points on
the wave are in phase?
A
B
C
D
Base your answers to the next five (5) questions on the information and diagram below.
The diagram represents a wave traveling from left to right along a horizontal elastic medium. The horizontal distance
from b to f is 0.08 m. The vertical distance from x to y is 0.06 m.
34. If the period of the wave is 3 seconds, what is the frequency?
35. If the crest at b takes 3 seconds to move from b to f, then what is the speed of the wave?
36. As the wave moves to the right from its present position, in which direction will the medium at point e first
move?
37. What is the amplitude of the wave?
38. If the frequency of a wave is doubled and the velocity remains constant, what happens to its wavelength?
39. As a train moves down the track, coming toward an observer at a constant rate, the frequency of the sound
waves coming toward the observer will be_____________________. This is known as the ____________
Effect.
40. The number of waves passing a given point each second is the wave's (i.e. counts per second) _________.
41. How many nodes and antinodes are shown in the standing wave?
42. How high or low we perceive a sound to be, depending on the frequency of the sound wave, is defined as the
_______.
43. What is the period of a wave with a frequency of 3.0 x 103 Hz?
44. The energy of mechanical wave is associated with its _________________________.
45. The diagram below shows straight wave fronts passing through an opening in a barrier. What is this wave
phenomenon called?
Name ______________________________________________________________________________
OPTICS
46. A plane mirror will form an image that is ____,_____,_______
The diagram shows a concave spherical mirror having principal focus F and center of curvature C. Point A lies on the
principal axis.
47. When an object is placed at point A, where is its image is observed?
48. If an object is located at point A, its image has what properties?
49. A ray of light is reflected from a plane mirror. If the angle between the incident and reflected rays is 40˚, the
angle of incidence is
Base your answers to the following three (3) questions on the information and diagram below.
An object is located at the center of curvature C of a concave spherical mirror with principal focus F. The focal length of
the mirror is 0.10 m.
50.
51.
52.
53.
54.
As the object is moved from point C toward point F, the size of the image______________________
At what distance from the mirror is the image located?
At what distance from the mirror could the object be placed to produce a virtual image of the object?
If an object is placed at the focal point of a concave mirror, where will the image be?
The diagram below shows a light ray parallel to the principal axis of a convex (diverging) mirror. Point F is the
virtual focal point of the mirror and C is the center of curvature. After the light ray is reflected, it will pass
through point ____.
55. For a concave (converging) mirror, if the magnification is -14, then
a. The image is ______________ (upright/inverted/don’t know)
b. The image is ______________ (enlarged-bigger / reduced-smaller / same size)
c. The image is ______________ (real / virtual / don’t know)
56. When will a concave mirror NOT form an image from a reflected object?
Base your answers for the next three (3) questions on the information below.
When a 0.040 m tall object is placed 0.3 m in front of a converging mirror, the object's image appears 0.60 m in front of
the mirror.
57. How tall is the image?
58. What is the focal length of the mirror?
59. The image of the object is virtual/real and upright/inverted.
60. What symbol indicates that an image produced by a concave mirror is virtual?