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A quarterback claims that he can throw the football a horizontal distance of 183 m (200 yd). Furthermore, he claims he can do this by launching the ball at the relatively low angle of 30.0 degrees above the horizontal. To evaluate this claim, determine the speed with which this quarterback must throw the ball. Assume that the ball is launched and caught at the same vertical level and that air resistance can be ignored. For comparison, a baseball pitcher who can accurately throw a fastball at 45 m/s (100 mph) would be considered exceptional.
Two protons are moving directly toward one another. When they are far apart, What is the distance of closest approach?
a block is pushed up 38 degree incline with a coefficient of kinetic friction of 0.10 by an applied force as shown. if F= 30N and M=8kg
A projectile is fired from the surface of the Earth with a speed of 200 meters per second at an angle of 30 degress above the horizantal. If the ground is level, illustrate what is the maximum height reached by the projectile?
Tarzan swings on a 27.0 m long vine initially inclined at an angle of 33.0° with the vertical. What is his speed at the bottom of the swing if he starts from rest
A 58-kg water skier is being pulled by a nylon tow rope that is attached to a boat. What is the change in the length of the rope when the skier has an acceleration whose magnitude is 0.90 m/s2
A 72 kg meteorite buries itself 5.0 m into soft mud. The force between the meteorite and the mud is given by , What was the speed of the meteorite
A motorist driving along a straight road at a constant speed of 60 -m/s. At time t=0 she passes a parked motorcycle police officer and begins to accelerate at the constant acceleration.
A laser used in eye surgery emits a 3.12 mJ pulse in 1.11 ns, focused to a spot 25.7 um in diameter on the retina. Calculate (in SI units) the power per unit area at the retina
A cube of wood have and edge dimension of 20.0cm and a density of 650 kg/m^3 floats on water. what mass of lead should be place on the cube
A tank of gasoline (n = 1.40) is open to the air (n = 1.00). A thin film of liquid floats on the gasoline and has a refractive index that is between 1.00 and 1.40. What is the refractive index of the film
A space probe with a rest mass of 8.2*10^7kg and a speed of 0.5c smashes into an asteroid at rest and becomes embedded within it. what is the rest mass of the asteroid
according to the bureau of labor statistics the average hourly wage in the us was 22.57 in may 2010. a random sample
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