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A student (m=63 kg) falls freely from restand strikes the ground. During the collision with the ground, hecomes to rest in a time of 0.010 s. The average force exertedon him by the ground is +18,000 N, where the upward direction istaken to be the positive direction. From what height did thestudent fall? Assume that the only force acting on him during thecollision is that due to the ground.
Maria stands at the top of a 30 meter high cliff. She tosses a stone vertically up into the air, off the edge of the cliff, What is the stone's velocity when it hits the ground
question1a traffic light weighing 1.20 x 102 n hangs from a vertical cable tied to two other cables that are fastened
An object is shot at 56 m/s horizontally off the roof of a building which is 55 meters above the ground. How long does it take the object to reach the ground in seconds
A laserpointer has a beam intensity of 55 W/m2 and a beam radius of 2.1 mm. what is the force on the car
What is frequency of the rotational motion for the wheel
You are visiting a pizza parlor and watch the chef make a pizza crust. He throws a spinning disk of dough in the air. Its angular velocity is 15 rad/s. What is the final rotational kinetic energy of the dough
Find a relation between the variables that would guarantee that the block is initially slowing down.
Shaving/makeup mirrors typically have one flat and one concave (magnifying) surface. What is the focal length of the mirror
A car with a mass of 1000 kg is driving over a hill at a constant speed of 60 m/s. What is the weight (in N) of the car at the top of the hill
Eyeglass lenses can be coated on the inner surfaces to reduce the reflection of stray light to the eye. If the lenses are medium flint glass of refractive index 1.62 and the coating is fluorite of refractive index 1.432,
A crate of 48.0 tools rests on a horizontal floor. You exert the gradually increasing horizontal push on it and observe that the crate just begins to move while your force exceeds 344. After that you must reduce your push to 260 to keep it moving at ..
A toy balloon is filled with helium gas He at 1 atm and 28 degree C If the volume of the balloon is 0.024m^3 , how many atoms does it contain
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