An automobile horn sends out waves in air 2.2 ft long. If the speed of sound is 1100ft/ sec, what is the frequency of the source?
Two strings on a musical instrument are required to emit different ton
What happens to the frequency of an organ pipe if you saw off a bit of the end of the pipe?
A pipe closed at one end and open at other will give a. All even harmonics b. All odd harmonics c. All the h
If a tree falls in the forest and there's no one there to hear it, does it make a sound? a) Yes b) No
A particular molecule in a sound wave is traveling at its maximum speed. What can be said about th
y
Wave Pulse
x
y
Wave Pulse
X-vt
X
x
A piston at the end of a pipe moves in and out. What type of wave does the piston produce in the pipe? a) transverse b) longitudinal c) combonation
A wave moves al
Tacoma Narrows Bridge http:/www.youtube.com/watch?v=Ce-PQqkIXe0&feature=related
A mass on a spring oscillates at a frequency of 2 Hz. If the mass is doubled, what is the new frequency of oscillation?
A wrench is used to attempt to turn a bolt. The bolt has a radius of 1cm and the wrench is 30cm long. a) Draw the extended force diagram for the bolt/wrench system. b) Write out the expression that wo
A wheel is free to rotate on an axle that has a built-in motor. If the axle is placed on the ice and the motor begins to turn the wheel, what happens to the axle? a) It begins to turn the same directi
A ball rotates around on a string. If the string length were doubled and the velocity held constant, what would happen to the angular momentum?
A solid disk and a hoop of equal radius both rotate arou
You are trying to turn a rusty bolt. Which of the following would work the best?
A B
F C D
F
F F
You are riding an exercise bike. If a frictional force F is applied to the rim of the wheel, what force
A 1,000kg vehicle is traveling counterclockwise in a circle (r=40m) at a constant speed of 10m/s. What is the vehicle's moment of inertia?
Three more cars are added and the radius of the track is doub
Rotational coordinates are:
s = r
Therefore:
vt = r
at = r
OLD EQUATIONS vf = vi + at xf = xi + vit + 0.5at2 vf2 = vi2 + 2a(xf xi) xf = xi + 0.5(vi + vf)t
NEW EQUATIONS f = i + t f = i + it + 0.5t2 f2
Two objects collide. Under what conditions are the final velocities both zero?
You are sitting at your desk and wish to close the door by throwing something at it. You have a bouncy ball and a sticky
A truck and a car are moving along the road with equal momentum. Each driver hits the brakes. If both vehicles stop in the same time, which brakes applied the greater force? a) The truck's brakes. b)
A giant, 1m2 suction cup is stuck to the ceiling. About how many 100kg (220lb) people will it hold? a) 1 b) 2 c) 5 d) 10 e) 50 f) 100 g) 1000
A container is filled with oil and fitted on both ends wit
For the following situation, give an expression for conservation of energy: a) in terms of Ui, Uf, Ki, Kf, fk, and d. b) in terms of m, fk and the given numbers.
yf = 0.5m 35
vi = 5m/s
For the followi
A non-bouncy object is dropped from the top of a 100m building. If the object comes to rest upon hitting the ground, does this defy conservation of energy? Explain.
A 0.5 kg toy sinks into the lake. I
A snowball at the top of a small mountain breaks in half. One half rolls down the left side and the other down the right side, as shown below. Given that the mountain is 45m tall, determine the change
A snowball at the top of a small mountain breaks in half. One half rolls down the left side and the other down the right side, as shown below. Given that the mountain is 45m tall, determine the speed
A snowball at the top of a mountain breaks in half. One half rolls down the left side and the other down the right side, as shown below. On which snowball does the earth do more work?
Two sleds slide
A glass of water contains a large ice cube. What will happen to the level of the liquid water when the ice melts? a) It will go up. b) It will go down. c) It will remain at the same level.
A log float
The crate below slides down a ramp with a rough surface. Draw a force diagram for the crate.
The 10kg crate below slides down a ramp with a rough surface, with k=0.25. Find the coefficient of kinetic
Draw accurate (proportionate) force diagrams for each of the masses below.
5 kg
8 kg
Write out Newton's 2nd Law for each of the masses below.
5 kg
8 kg
Consider the movable pulley to be part of the 5
Which of the force diagrams below represents an object moving counterclockwise and slowing down?
You are at the fair in the vertical Loop of Death. When you are at the top of the ride, the frictional
A ball swings in a horizontal circle at constant speed, as shown. Draw a force diagram for the ball from the top view. (You may neglect gravity.)
Top View
A 1.5 kg ball swings in a horizontal circle a
Three pictures of equal weight (20 N) are hung by wires in three different orientations. In which orientation are the wires least likely to break?
A car is moving toward the right. Then a force is app
Big Bubba has a mass of 100 kg on the earth. What is Big Bubba's mass on the moon where the force of gravity is approximately 1/6-th that of Earth's?
Little Billie weighs 360 N on Earth. What is Littl
A vehicle is traveling counterclockwise in a circle at a constant speed. At the moment shown below, is the vehicle accelerating? If not, explain. If so, draw the acceleration vector.
A vehicle is trav
A football is kicked into the air at an angle of 45 degrees with the horizontal. At the very top of the ball's path, its velocity is _. a. entirely vertical b. entirely horizontal c. both vertical and
A soccer ball rolls slowly across the road and down a hill as shown below.
Which of the following sketches of ax vs. t is a reasonable representation of the horizontal acceleration of the ball as a fu