6. A soccer ball has a mass of 0.41 kg, initially moving to the left with a speed of 25 m/s; but then it is kicked so that it acquires a velocity with magnitude 35 m/s and direction 48° up and to the right (as in the figure).
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A: a) Loss in KE = 0.5*(3.8*106)* (19*103)2 =6.859*1014J
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Q: On August 10, 1972, a large meteorite skipped across the atmosphere above the western United States…
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- A 0.2 kg softball is thrown straight up with an initial speed of 9 m/s. How high in meters does it go? Round to two significant figures.Calculate the final speed (in m/s) of a 100 kg rugby player who is initially running at 7.50 m/s but collides head-on with a padded goalpost and experiences a backward force of 1.65 x 10* N for 7.50 x 10 -2 S. m/sA thin rod of length L = 3.00 m with variable mass density (x) = 3.00x² kg/m lies on the x-axis with one end at the origin. Where on the X-axis is the center of mass of this rod? {note this is a variable mass density} O 2.50 m O 1.50 m O 2.25 m O 2.70 m O 1.88 m 279
- Flying Circus of Physics On August 10, 1972, a large meteorite skipped across the atmosphere above the western United States and western Canada, much like a stone skipped across water. The accompanying fireball was so bright that it could be seen in the daytime sky and was brighter than the usual meteorite trail. The meteorite's mass was about 3.7 × 106 kg; it's speed was about 14 km/s. Had it entered the atmosphere vertically, it would have hit Earth's surface with about the same speed. (a) Calculate the meteorite's loss of energy (as a positive number, in joules) that would have been associated with the vertical impact. (b) Express the energy as a multiple of the explosive energy of 1 megaton of TNT, which is 4.2 × 1015 J. (c) The energy associated with the atomic bomb explosion over Hiroshima was equivalent to 13 kilotons of TNT. To how many Hiroshima bombs would the meteorite impact have been equivalent? (a) Number (b) Number Units Units (c) Number UnitsHunter aims his gun vertically and shoots a 465 g game, which is positioned, on a telephone pole. The bullet has a mass of 60 g and is traveling at a velocity of 450 m/s upwards just before it hits the target. The bullet passes through the target, emerging with a velocity of 295 m/s upwards. How high does the target rise after being hit by the bullet?At the center of a 47.0 m diameter circular ice rink, a 56.0 kg skater traveling north at 2.60 m/s collides with and holds onto a 59.0 kg skater who had been heading west at 1.05 m/s. How long (in seconds) will it take them to reach the edge of the rink assuming negligible friction and drag?
- tolerance is 3 sig figsThe superheroine Xanaxa, with a mass of 69.9 kg, is in a hair-raising chase after the 72.7-kg arch-villain Lexlax. She leaps from the ground to the top of a 195-m-high building, then dives off and comes to rest at the bottom of a 15.7-m-deep excavation, where she finds Lexlax and neutralizes him. Does all this bring about a net gain or a net loss of gravitational potential energy? Gain Loss By how much? Answer with a positive number. Take g = 9.81 m/s?. Number JTwo forces, F :(-4.00î – 3.95ĵ) N and F, = (-3.95î – 4.95j) N, act on a particle of mass 1.90 kg that is initially at rest at 1 coordinates (+1.95 m, +4.05 m). (a) What are the components of the particle's velocity at t = 11.1 s? m/s (b) In what direction is the particle moving at t = 11.1 s? ° counterclockwise from the +x-axis (c) What displacement does the particle undergo during the first 11.1 s? (d) What are the coordinates of the particle at t = 11.1 s? X = m y =