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A rock is thrown from the roof of a building with a velocity vo and an angle of alpha(o) from the horizontal. The building has hight h and you can ignore air resistance. Calculate the magnitude of the velocity of the rock just before it strikes the ground and show that this speed is independent of alpha(o).
a car traveling in a straight line has a velocity of 8.5 ms. after 6.0 s its velocity is 8.0 ms. what is the cars
A charged particle (m=5.0g, q= -70µC) moves horizontally at a constant speed of 30 km/s in a region where the free fall gravitational acceleration is 9.8 m//s^2 downward, what is the magnitude of the magnetic field in this region
The initial speed of a cannon ball is 0.20 km/s. what is the minimum time of flight for the ball
Consider a hoop of mass 2.1 kg and radius 0.57 m that rolls without slipping down an incline. What forces act on the hoop
To finance her community college education, Joanna takes out a Stafford loan for $4500. How much will she pay
find the initial velocity of the ball. An echo is heard in 3 sec after the emission of sound. If speed of sound in air is 342 m/s, what is the distance of the reflecting surface from the source.
An isolated copper sphere of radius 4.85cm, at first uncharged, is illuminated by ultraviolet light of wavelength 244nm. The work function for copper is 4.70 eV. What charge does the photoelectric effect induce on sphere.
A skier has a speed of 5.0 m/s on top of a hill that is 30.0 m above the valley floor. Determine the speed of the skier while she is in the valley floor
Two cylinders have the same radius R = 0.6 m and length 0.6 m, but one is a solid cylinder of massM1 = 4.5 kg, What is the ratio of the final speed of the solid cylinder to that of the hollow cylinder
A 1.67 m tall person lifts a 2.34 kg book from the ground so it is 2.22 m above the ground. Calculate the work done by the person
He is unable to get to the other side because of a lack of friction between his shoes and the ice. How long does it take him to reach the south shore
q1. a student who weighs 510 n is wearing a backpack that weighs 70 n. the student is standing still on a level ground.
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