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As a helicopter carrying a crate takes off, its vertical position (as well as the crate's) is given as: y(t) = At^3 where A is a constant and t is time with t = 0 corresponding to when it leaves the ground. When the helicopter reaches a height of 15.0 m a crate falls from the underside of the aircraft. From the time the crate leaves the helicopter to the time it hits the ground, 3.5 seconds pass. Calculate A. Which Physics principle laws or definitions did you use?
A cylinderical wooden log rolls (without slipping) down a small ramp. The log has a radius of 15 cm, a length of 2.0 m, and a mass of 78 kg. What is the log's total kinetic energy at the bottom of the ramp
A fisherman's scale stretches 4.2 cm when a 2.6 kg fish hangs from it. What will be the amplitude and frequency of vibration if the fish is pulled down 3.0 cm more and released so that it vibrates up and down
An object is launched upward with initial velocity 10.0m/s. What maximum height can it reach
What diameter must a helium filled balloon have to float with neutral buoyancy? The mass of the empty balloon is 2.0g
An inductor, a capacitor, and a 64.0-? resistor are connected in series with an AC generator; the generator produces an RMS voltage of 90 V. what is the average power output of the generator
A disk-shaped merry-go-round of radius 2.78mand mass 160kg rotates freely with an angular speed of 0.696rev/s. What is initial and final kinetic energy
We can roughly model a gymnastic tumbler as a uniform solid cylinder of mass 70.0kg and diameter 1.00m . A) If this tumbler rolls forward at 0.550 rev/s, how much total kinetic energy does he have? B) What percent of his total kinetic energy is ro..
A rectangular loop is located next to a long straight wire carrying a current of 30.0 A. What is the direction of the net force on the loop
q. an electron is projected with an initial speed u0 1.60 x 106 ms into the uniform field between the parallel plates.
q1. a force vector points at an angle of 64.9 deg above the x axis. it has a y component of 276 newtons n. find out a
An angry rhino with a mass of 2300 kg charges directly toward you with a speed of 4.30 m/s. Determine the speed of the ball after it bounces back elastically toward you
Three point charges are arranged along the x axis. Charge q1= -4.70 nC is located at x= 0.200 m and charge q2 = 2.20 nC is at x = -0.340 m. A positive point charge q3 is located at the origin.
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