You throw a 0.145 kg baseball straight up, giving it an initial velocity of magnitude 20.0 m/s. Find how high it goes, ignoring air resistance.
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You throw a 0.145 kg baseball straight up, giving it an initial velocity
of magnitude 20.0 m/s. Find how high it goes, ignoring air resistance.
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- A loaded ore car has a mass of 950 kg and rolls on rails with negligible friction. It starts from rest and is pulled up a mine shaft by a cable connected to a winch. The shaft is inclined at 30.5° above the horizontal. The car accelerates uniformly to a speed of 2.05 m/s in 11.0 s and then continues at constant speed.A skateboarder of mass 70.0 kg approaches the top of a hill at a velocity of 2.0 m/s. The hill is 10.0 m high. Determine his final velocity at the bottom of the hill if he coasts from the top to the bottom of the hill. Assume his skateboard bearings are frictionless and air resistance is negligible.A clever coyote uses rocket powered skates to try to catch a roadrunner. The mass of the coyote is 38.1 kg.If the coyote starts from rest, and accelerates to a final speed of 26 m/s in a distance of 2.4 m. How fast is the coyote moving when he has traveled 2.11m while he is slowing down? Assume his initial speed when he is slowing down is equal to his final speed when the rockets were firing.
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- A student launches a small rocket which starts from rest at ground level. At a height of h = 1.8 km the rocket reaches a speed of vf = 342 m/s. At that height the rocket runs out of fuel, so there is no longer any thrust propelling it. Take the positive direction to be upward in this problem B: After the rocket's engine turns off at a height of h = 1.8 km, it continues to move upward due to the velocity that it reached. What is the rocket's acceleration, in meters per second squared, during the period from engine shutoff until it returns to the ground? Ignore air resistance. C: Calculate the maximum height, in meters above ground level, that the rocket reaches.lower a crate of mass ?1=5.00 kgm1=5.00 kg to the bottom of a steep ravine of height ?=25.0 mH=25.0 m. The crewman of mass ?2=55.6 kgm2=55.6 kg is walking while holding the rope, being careful to lower the crate at a constant speed of ?0=1.50 m/sv0=1.50 m/s. Unfortunately, when the crate reaches a point ℎ=13.9 mh=13.9 m above the ground, the crewman steps on a slick patch of ice and slips. The crate immediately accelerates toward the ground, dragging the hapless crewman across the ice and toward the edge of the cliff. Assuming the ice is perfectly slick, so that there is no friction between the crewman and the ice once he slips and falls down, at what speed ?1v1 will the crate hit the ground? Assume also that the rope is long enough to allow the crate to hit the ground before the crewman slides over the side of the cliff, and that the pulley is frictionless. ?1The Avengers are having a strength competition. The Hulk is tossing 1.20 x 104 kg busses so they slide on their roofs across a grassy field. The coefficient of friction between the busses and the grass is 0.185. The contestants have to use their strength to stop the bus...shortest stopping distance wins. Hawkeye steps up first. Hulk throws the bus with a velocity of 8.50 m/s[W]. Hawkeye jumps in and applies a stopping force of 4.00x103 N. Black Widow is next. Hulk throws the bus with a velocity of 8.25 m/s[W]. Black Widow remembers her physics class and instead of jumping in front of the bus, she drops a 6.00 x 103 kg steel beam onto it to increase the mass and therefore the friction force. Which bus stops in the shortest distance? Be sure to show all your work, use GRASP, and good problem solving form...and, don’t forget to include good F.B.D.s. This is one question please include as many steps as you can thank you!
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