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Consider a ball with mass m = 50 kg. The ball is at rest on a cliff 328 feet above the ground. (A) Derive an equation that describes the potential energy of the ball as a function of time after it falls off the cliff. (B) How much kinetic energy (in Joules) does the ball have 2.1 seconds after it falls?
A glass is slid across a table top, goes off the edge and falls to the floor below. With what velocity did the glass leave the table top
Water is transported upward in a plant through xylem tissue, which consists of cells of 1 mm length and a diameter of 65 µm. The xylem cells are attached to each other to form a channel. To what maximum height can water rise in these xylem channel..
A train has the length of 114 m and starts from rest with a constant acceleration at time t = 0 s. At this instant, a car just reaches the end of the train.
An open organ pipe has its fundamental frequency at 320 Hz. The first overtone of a closed organ pipe has the same frequency as the first overtone of the open pipe, How long (in meters) is the closed pipe
The ball hit with 15 m/s and then bounced backwards with 15 m/s. The interaction time with the wall was 0.5 ms. If the ball's mass is 0.1 kg, what is the average force of the wall on the ball?
Rigel, a bluish-white star in Orion, radiates with a peak wavelength of 145 nm. Find the temperature of Rigel's surface
A 100 kg scaffold is 5.8 m long. It is hanging with two wires, one from each end. A 480 kg box sits 1.4 m from the left end. What is the tension in the left hand side wire?(g = 9.8 m/s2)
You are riding your bicycle directly away from a stationary source of sound and hear a frequency that is 2.6% lower than the emitted frequency. If the speed of sound is 342 m/s, what is your speed?
A car (mass = 1060 kg) is traveling at 39 m/s when it collides head-on with a sport utility vehicle (mass = 2380 kg) traveling in the opposite direction. At what speed was the sport utility vehicle traveling
A top spinning at 4.00 rev/s comes to a stop in 64.0 seconds. Assume that the top slows down at a constant rate. How many revolutions does it make before coming to a stop
What is the magnetic field at the center line of a linear solenoid of diameter D=0.125 m that is 1.00m long and carries current I=1.25 A? This solenoid has N=625 loops of copper wire.
Suppose that a particle of mass 0.24 kg acted upon by a spring undergoes simple harmonic motion with a period of 1.2 s, What is the total energy of this motion
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