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A football player kicks a ball with a speed of 22.5 m/s at an angle of 47° above the horizontal from a distance of 35 m from the goal line. By how much does the ball clear or fall short of clearing the crossbar of the goalpost if that bar is 3.05 m high? (b) What is the vertical velocity of the ball at the time it reaches the goalpost?
A playground carousel is free to rotate about its center onfrictionless bearings, and air resistance is negligable. What is the person's mass
A bowler throws a bowling ball of radius R = 11 cm down a lane. The ball slides on the lane with initial speed vcom,0 = 10.5 m/s and initial angular speed ?0 = 0. What is the speed of the ball when smooth rolling begins
A 3.1kg block of wood sits on a table. A 3.0 gbullet, fired horizontally at a speed of 540m/s , find the speed of the block immediately after the bullet exits
It has been suggested that rotating cylinders about 12 mi long and 5.1 mi in diameter be placed in space and used as colonies. What angular speed should such a cylinder have so that the centripetal acceleration at its surface equals free-fall acce..
A standing wave on a 77.4cm long string has three antinodes. If the string has linear mass density 3.92×10?5kg/m and tension 10.1N , what are the wave's frequency
Calculate the energy needed to accelerate a spaceship of mass10,000 kg to a speed of .3c for intergalactic spaceexplortation. Compare this with a projected annual energy usage onEarth of 1021.
A violinist is tuning the A string on her violin by listening for beats when this note is played simultaneously with a tuning fork of frequency 440 Hz. What was the frequency of the mistuned A string
Julie drives 100 mi to Grandmother's house. On the way to Grandmother's, Julie drives half the distance at 35.0mph and half the distance at 73.0mph. What is her average speed on the return trip
The earth orbits the sun in an approximately circular orbit of radius 1.496 X 10^11 m (about 93 million miles) in a period of 365 1/4 days. Use these data to determine the mass of the sun
A stunt driver wants to make his car jump over eight cars parked side by side below a horizontal ramp, what is the new minimum speed
a car originally traveling at 30ms manages to brake for 5.0 seconds while traveling 125 m downhill. at that point the
A machine gun fires 25-g bullets at the rate of 4 bullets per second. What is the average recoil force experienced by the machine gun
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