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For a science fair competition, a group of high school students build a kicker-machine that can launch a golf ball from the origin with a velocity of 11.3 m/s and initial angle of 32.8 degrees with respect to the horizontal. Range is 11.9 m. How high will be the highest point of trajectory?
One of the asteroids, asty, looks like an elongated potato. Surprisingly it has a tiny (compared to asty) spherical moon! Find the escape speed on Dactyl
The coefficient of kinetic friction between a refrigerator (mass 125 kg) and the floor is 0.18, What is the minimum force required to keep it moving with a constant velocity
The femur is a bone in the leg whose minimum cross-sectional area is about 3.60 multiply.gif 10-4 m2. Find the maximum stress that this bone can withstand
A guitar string is74cm long and has a mass of 3.6 g. The distance from the bridge to the support post isL= 60 cm, and the string is under a tension of533N. What is the frequency of the second overtone
A box of mass 32 kg is at rest on a horizontal frictionless surface. A constant horizontal force then acts on the box, and accelerates it to the right. It is observed that it takes the box 6.5 seconds to travel 48 meters. What is the magnitude of for..
One of the contests at the school carnival is to throw a spear at an underwater target lying flat on the bottom of a pool. The water is 1.2 m deep. At what angle below horizontal should you throw the spear in order to hit the target
A parachutist with a camera, both descending at a speed of 11 m/s, releases that camera at an altitude of 140 m. Explain how long does it take the camera to reach the ground?
Two boats start together and race across a 56km wide lake and back. Boat A goes across at 56 km/h and returns at 56km/h. Boat B goes across at 28km/h, and its crew, realize how far behind it is getting.
A cyclotron (see figure below) designed to accelerate protons has an outer radius of 0.333 m. Find the speed at which protons exit the cyclotron
A pendulum consists of a sphere of mass 1.8 kg attached to a light cord of length 10.5 m, What is the tension of the cord at the lowest point
A doubly charged helium atom whose mass is 6.6 10 to 27 kg is accelerated by a voltage of 2200 V. What will be its radius of curvature if it moves in the plane perpendicular to a uniform 0.308 T field?
Starting from rest, you move with a constant acceleration of 2.1 m/s2 for 13.0 s and then move with an acceleration of -2.1 m/s2 for another 13.0 s. How far do you go during the whole trip
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