1. A pair of toy cart wheels are rolled obliquely from a smooth surface onto two plots of grass - a rectangular plot as
shown at the left, and a triangular plot as shown at the right. The ground is on a slight incline so that after slowing
down in the gra
1.An apple that has a mass of 0.1 kilogram has the same mass wherever it is.
The amount of matter that makes up the apple _
A. depends upon B. does not depend upon
the location of the apple. It has the same resistance to acceleration wherever it is - its
1.
Which bottle is the most stable?
Which bottle is the least stable?
Which bottle has neutral stability?
2.
Discuss with your neighbor the direction of each weight vector and then decide which truck will tip over
and why.
3.
Which requires more work to t
1. Light from a flashlight shines on a mirror and illuminates one of the cards. Draw the reflected
beam to indicate the illuminated card.
Which card would you see?
2. A periscope has a pair of mirrors in it. Draw the light path from the object to the eye
1. How much current flows in a 1000-ohm resistor when 1.5 volts are impressed across it?
2. If the filament resistance in an automobile headlamp is 3 ohms, how many amps does it draw when connected to a
12-volt battery?
3. The resistance of the side light
Many power companies provide power to cities that are far from the generators.
A. Consider a city of 100,000 persons who each use continually use 120 W of power (equivalent
to the operation of two 60-W light bulbs per person). The power constantly consume
1.A boy hits a 0.05-kg golf ball, giving it a speed of 75 m/sec.
What impulse did he deliver to the ball?
If the duration of impact is 0.01 seconds, what was the average force of impact?
2.During an automobile crash test, a 1000 kg car is sent towards a c
1. Fill in the lines, writing in the values of velocity components ascending, and you calculate
resultant velocities descending ?
A_
B_
C_
D_
E_
F_
G_
2.A child tosses a second ball along the dashed path. The velocity vector, complete with its
horizontal
1.Carefully count the number of wavelengths (same as the number of wave crests) along the
following paths between the slits and the screen.
The number of wavelengths between slit A and point a equals
The number of wavelengths between slit B and point a eq
1.You're in a car at a traffic light. The light turns green and the driver "steps on the gas."
a. Your body lurches
A. forward.
B. not at all.
C. backward.
b. The car accelerates
A. forward.
B. not at all.
C. backward.
c. The force on the car acts
A. forw
1. This first figure shows "Newton's Mountain," so high that its top is above the drag of the atmosphere. The
cannonball is fired and hits the ground as shown.
Describe its path as the cannon is fired faster and faster, but still less than 8 km/s.
What is
1. Consider a balloon filled with 1 liter of water (1000 cm3) in equilibrium in a container of water.
a. What is the mass of the 1 liter of water?
b. What is the weight of the 1 liter of water?
c. What is the weight of water displaced by the balloon?
d. W
1.
Which letter designates the electron orbiting the nucleus?
A or B
Which letter designates the proton in the nucleus?
A or B
Is the electron positively or negatively charged?
Is the proton positively or negatively charged?
The electrical interaction bet
Questions
1. The Brake shoes of your car are make of a material that can tolerate very high temperatures
without being damaged. Why is this so?
2. When you pound a nail with a hammer, the nail gets quite warm. Describe the energy
transformations that lead
Questions
2. Starting from rest, object 1 is subject to a 12 N force for 2.0 s. Object 2, with twice the mass, is subject
to a 15 N force for 3.0 s. Which object has the greater final speed? Explain.
14. To win a prize at the county fair, you're trying to
Questions
1. Rub your hands together vigorously. What happens? Discuss the energy transfers and
transformations that take place.
2. Write a few sentences describing the energy transformations that occur from the time moving
water enters a hydroelectric pl
Question
1. An object is acted upon by two (and only two) forces that are of equal magnitude and
oppositely directed. Is the object necessarily in static equilibrium?
4. Suppose you are hanging from a tree branch. If you move out the branch, farther away
Questions
5. If you have ever driven a truck, likely found that it had a steering wheel with a larger diameter than that
of a passenger car. Why is this?
6. A common type of door stop is wedge made of rubber. Is such a stop more effective when jammed
unde
Questions
1. A hockey puck slides along the surface of the ice. If friction and air resistance are negligible,
what force is required to keep the puck moving?
2. If an object is not moving, does that mean that there are no forces acting on it? Explain.
3.
Questions
1. a. write a paragraph describing the particle model. What is it, and why is it important?
b. Give two examples of situations, different from those described in the text, for which the particle model is
appropriate.
c. Give two examples of situ
Questions
1. The batter in a baseball game hits a home run, as he circles the bases, is his angular velocity positive or
negative?
2. Viewed from somewhere in space above the north pole, would a point on the earth's equator have a
positive or negative ang
Questions
1. An object is subject to two forces that do not point in opposite directions. Is it possible to
choose their magnitudes so that the object is in equilibrium? Explain.
3. What forces are acting on you right now? What net force is acting on you
Questions
1.
a. car a vector have nonzero magnitude if a component is zero? If no, why not? If yes, give an example.
b. can a vector have zero magnitude and a nonzero component? If no, why not? If yes, give an example.
2. Is it possible to add a scalar to
Questions
4. You are driving down the road at a constant speed. Another car going a bit faster catches up with you and passes
you. Draw a position graph for both vehicles on the same set of axes, and note the point on the graph where the other
vehicle pas