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1. A skateboarder moving at 6.15 m/s along a horizontal section of a track that is slanted upward by 46.9o above the horizontal at its end, which is 0.544 m above the ground. When she leaves the track, she follows the characteristic path of projectile motion. Ignoring friction and air resistance, find the maximum height H to which she rises above the end of the track.
2. A tennis ball is struck and departs from the racket horizontally with a speed of 29.4 m/s. The ball hits the court at a horizontal distance of 20.7 m from the racket. How far above the court is the tennis ball when it leaves the racket?
3. A 51.8-g golf ball is driven from the tee with an initial speed of 56.7 m/s and rises to a height of 34.4 m.
(a) Neglect air resistance and determine the kinetic energy of the ball at its highest point.
(b) What is its speed when it is 8.43 m below its highest point?
A positive charge of 3.0 \muC is pulled on by two negative charges. One, -2.0 \muC, is 0.050 m to the north and the other, -4.0 \muC, is 0.030 m to the south. What total force is exerted on the positive charge?
TV broadcast antennas are the tallest artificial structures on Earth. In 1987, a 72.0-kg physicist placed himself, By how much was the antenna compressed
Consider two point charges located on the x axis: one charge, q1 = -10.0nC, is located atx1 = -1.700m ; the second charge, q2 = 35.5nC ,is at the origin (x=0.0000). What is the net force exerted by these two charges
While standing at the edge of the roof of a building, you throw a stone upward with an initial speed of 6.41 m/s. At what speed does the stone impact the ground
A steel washer is suspended inside an empty shipping crate from a light string attached to the top of the crate, What is the coefficient of kinetic friction between the ramp and the crate
A 25 g bullet strikes and becomes embedded in a 1.35 kg block of wood placed on a horizontalsurface just in front of the gun. what was the muzzle speed of the bullet
A person notices a mild shock if the current along a path during the thumb and index finger exceeds 71 A. Compare the maximum possible voltage without shock across the thumb and index finger with a dry-skin resistance of 4.9*105 and a wet-skin resist..
A 670-W space heater is designed for operation in Germany, where household electric outlets supply 230 V (rms) service. What is the power output of the heater
A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.55 10^4 m/s, and the radius of the orbit is 5.50 10^6 m. What is the orbital speed of the second satellite
A 13 g bullet traveling 226 m/s penetratesa 2.0 kg block of wood and emerges going 164 m/s. If the block is stationary on a frictionlesssurface when hit, how fast does it move after the bulletemerges?
A parallel-plate air capacitor is made from two plates 0.070 square, spaced 9.3 apart. What must the potential difference between plates be to produce an energy density of.
The hour hand on a certain clock is 9.0 centimeter long. Determine the tangential speed of the tip of this hand
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