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A skateboarder decides to try to jump from the top of a set of stairs and land at the bottom. She leaves the top of the stairs with a horizontal velocity of 15.0 m/s. If the top of the stairs is 2.0 m high, what will her horizontal displacement be?
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- Students launch a steel ball horizontally from a tabletop. The initial horizontal speed of the ball is v, the tabletop height above the floor is H.The objective is to get steel ball into the coffee can of height h. Calculate the distance D at which the students need to place the can to make a "bulls-eye". v = 6 m/sH = 7 mh = 0.17 m Use g = 10 m/s2, enter two digits after decimal.Billy launches a tennis ball with a sling shot at an angle of 62 degrees above the horizontal at a speed of 45 meters per second . The tennis ball lands in a nearby tree. How far away is the tree?In an article on the use of the sling as a weapon, the author states that a skilled slinger can sling a rock a distance of about 384 m. What is the minimum speed the rock must have when it leaves the sling to travel exactly 384 m? To solve this problem it will be necessary to first determine the required launch angle of the projectile. What launch angle must the projectile have in order to find the minimum speed required to achieve a given horizontal distance?
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- You buy a plastic dart gun, and being a clever physics student you decide to do a quick calculation to find its maximum horizontal range. You shoot the gun straight up, and it takes 4.2 s for the dart to land back at the barrel. What is the maximum possible horizontal range that could be achieved by your gun, assuming the dart lands at the same level it started?A long jumper leaves the ground with an initial velocity of 12 m/s at an angle of 28° above the horizontal. What is the horizontal range reached by the long jumper?A lacrosse player is practicing against a wall. The ball leaves his stick 2.3 meters above the ground at a 33.5 degree angle from the horizontal with a speed of 9.3 m/s. The ball then hits the wall, 3.7 meters away. How high above the ground does the ball make contact with the wall?