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A football punter accelerates a football from rest to a speed of 7 m/s during the time in which his toe is in contact with the ball (about 0.24 second). If the football has a mass of 0.50 kilogram, find what average force does the punter exert on the ball? N
A 47.3-kg skater is standing at rest in front of a wall. Bypushing against the wall she propels herself backward with avelocity of -2.41 m/s. Her hands are in contact with the wall for1.19 s. Ignore friction and wind resistance.
a certain lightbulb has a tungsten filament with a resistance of 22.5 omega when cold and 141 omega when hot. assume
The gravitational force that the sun exerts on the moon is perpendicular to the force that the earth exerts on the moon. find the magnitude of the net gravitational force on the moon
Megan's mass is 27 kg. She climbs the 4.8 m ladder of a slide and reaches a velocity of 3.6 m/s at the bottom of the slide. How much work was completed by friction on Megan? Imagine that air resistance is negligible.
n = 3.24 mol of Hydrogen gas is initially at T = 357 K temperature and pi = 2.79×105 Pa pressure. The gas is then reversibly and isothermally compressed until its pressure reaches pf = 7.62×105 Pa. How much work did the external force perform
two point charges -2q and 3q are on the x-axis -2q at the origin and 3q at x d. choose the potential to equal zero at
This cart rolls at 4 m/s toward a stationary 1kilogram cart. Evaluate the speed of each cart after the collision
In a TV set, an electron beam moves with horizontal velocity of 3.1×107 m/s across the cathode ray tube and strikes the screen, 50 cm away. How far does the electron beam fall while traversing this distance
A series RLC circuit consists of a 96.0 ? resistor, a 0.200Hinductor, and a 43.0 ?F capacitor. It is attached to a120 V/60 Hz power line. What is the average power loss
A wave has a speed of 500.0 m/s and a wavelength of 4.9 m. What is the frequency of the wave? What is the period of the wave?
The Sun has an apparent magnitude of -26.8 and absolute magnitude of 4.8 Calculate the apparent magnitude it would have at the distance of αCentauri (1.3 pc).
a rod 14.0 cm long is uniformly charged and has a total charge of -20.0 acircmicroc. determine the magnitude and
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