Work and Energy
These are the equations for work.
What is W = FΔxcosθ = ΔE?
A force that depends on the path taken is called...
What is non-conservative?
These parts of a car cause acceleration...
What is steering wheel, gas pedal, and brakes?
How do you find the velocity of a wave?
What is λ*f or λ/T?
This is when work is done on an object.
What is when force applied is parallel to displacement of the object?
A student swings a ball around his head in a perfectly circular, horizontal orbit with a constant Tension. Can this actually happen? Justify.
What is no, because of the force of gravity?
The speed of a sprinter (starting from rest) who accelerates at 1.5 m/s/s over 6 seconds.
What is 9 m/s?
When two waves interact with different frequencies, this is what is created...
What are beats?
What are no external forces?
A person who weighs 700 N is standing in an elevator. The elevator then accelerates upward at a rate of 4 m/s/s. During this acceleration, how much does the person weigh?
What is 986 N?
A biker brakes from 21 m/s to a stop in 32.3 m. What is the biker's acceleration?
What is -6.82 m/s/s?
The boundary conditions for open and closed tube resonance are...
What is node and antinode, and node and node?
A force F pulls a heavy suitcase of weight mg at an angle θ above the horizontal. The suitcase is pulled a distance d along a level floor at constant velocity. The coefficient of friction between the floor and the suitcase is μ. The work done by the force F is...
What is Fdcosθ?
A block of iron with mass 10kg is sitting on an incline that has an angle of 30 degrees above horizontal. What is the normal force on the block of iron?
A students throws a penny off the Empire State building at 5.6 m/s downwards. The building is 354 m tall. How fast is the penny traveling when it hits the ground? Ignore drag.
What is 84.32 m/s?
The ukulele is a short instrument, relative to a guitar. How does this affect the frequencies of sounds that these two instruments produce? Assume the two instruments use the same strings.
What is the shorter length strings produce higher frequencies?
A block of mass m is placed on a frictionless inclined plane with an incline angle θ. The block is released from rest and is stopped by a spring with spring constant k. The maximum compression in the spring is...
What is 2mgsinθ/k?
A block is accelerating down a slope at an angle of 45° and rate of 5 m/s/s. What is the coefficient of kinetic friction between the block and slope?
What is 0.29?
Kilauea in Hawaii is the world’s most continuously active volcano. Very active volcanoes characteristically eject red-hot rocks and lava rather than smoke and ash. Suppose a large rock is ejected from the volcano with a speed of 25.0 m/s and at an angle 35° above the horizontal. The rock strikes the side of the volcano at an altitude 20.0 m lower than its starting point. The time it takes to the ground is...
What is 3.96s?
The speed of sound waves in air is 342 m/s. Determine the fundamental frequency of a concert flute of length 66.04 cm.
What is 262.67 Hz?