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A quarterback claims that he can throw the football a horizontal distance of 196.6 m (215 yd). Furthermore, he claims that he can do this by launching the ball at the relatively low angle of 25° above the horizontal. To evaluate his 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.
a jugglers hands are 80 cm apart and the balls being juggled reach a maximum height of 100 cm above the jugglers
A cyclotron (see figure below) designed to accelerate protons has an outer radius of 0.348 m. Find the speed at which protons exit the cyclotron
A ball is suspended by a string and moves in a horizontal circle. One such pendulum has a 100g ball at the end of a 1.5 meter long string and has an orbit of radius 30.0cm. Determine the net force acting on the ball and the acceleration
A 1.42 103-kg car traveling initially with a speed of 20.0 m/s in an easterly direction crashes into the rear end of a 9.00 103-kg truck moving in the same direction at 14.0 m/s. What is the velocity of the truck right after the collision
A parcel of dry air is lifted isothermally such that its pressure decreases from 1000 hPa to 850 hPa. Calculate the change in the specific entropy of the parcel.
Giancoli, page 30 --when they say that x-xo increases with the square of the initial speed. Why do they say square of initial speed only, what about square of final speed? And why do they ignore that the distance also decreases by a factor of 2.
A 10 m beam of mass 330 kg extends over a ledge. The beam is not attached, but simply rests on surface. A 53 kg student intends to position the beam so that he can walk to the end of it. How far from the edge of the ledge can the beam extend.
An airplane is flying with a velocity of 95m/s at an angle of 19.0^circ above the horizontal. When the plane is a distance 124m straight above a dog that is standing on level ground, suitcase drops out of luggage compartment.
A block of crown glass immersed in water as in. A light ray is incident on the top faceat an agle of 01 42.0. with the normal and exist the block at point P. a) find the verical distance y from the top of the block to P. find the angle of refracti..
how much heat is required to raise an 720 g copper pan from 15 degrees celcius to 86 degrees celcius if a the pan is
Ship A is located 4.0 km north and 2.5 km east of ship B. Ship A has a velocity of 22 km/h toward the south, what is the least separation
what are the sum and difference frequencies between a 440 hz and c 523.25 hz? what frequencies will a spectrum analyzer
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