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You use an elevator to travel from the first floor (h = 0) to the fifteenth floor of a building (h = 45 m). If you start from rest and you end up at rest on the fifteenth floor, what is the work done by gravity on you? Assume you have a mass of 72 kg
A car is approaching a relecting wall. A stationary observer behind the car hears a sound of frequency 745Hz from the horn, What is the frequency of the car horn
A viewing window in the Atlanta aquarium is 58 inches wide and 52 inches high. what is the outward force on the window
A particle moving along the x axis in simple harmonic motion starts from its equilibrium position, the origin, at t = 0 and moves to the right. The amplitude of its motion is 1.70 cm and the frequency is 1.30 Hz.
assume a planet had a density that varied with radius according to the equation, ρ =A/r, where A is some constant. Determine a formula that gives the central pressure for this kind of planet.
A 4.20kg steel ball strikes a wall with a speed of 7 m/s at an angle of 60° with the surface. It bounces off with the similar speed and angle. If the ball is in contact with the wall for 0.20 s, what is the average force exerted by the wall on bal..
irplane A , starting from rest with constant acceleration, requires a runway 600m long to become airborne. How long must the runway be for airplane B
The distance between deer B and C is 92 m. What is distance between deer A and C.
A passenger in a roller coaster ride experienced weightless when s/he was at the top of the loop. If the loop has radius 16.0 m, what is the linear speed at the top
A bar AB of negligible mass and length 2 m balanced at its midpoint a 4 kg and 5 kg masses are suspended from both ends. A 4 kg mass is 0.4m away from the midpoint. At what point the mass of 5 kg is suspended to a bar keep the balance.
A 1x10^2-kg crate is being pushed across a horizontal floor by a force that makes an angle of 30.0° below the horizontal. The coefficient of kinetic friction is 0.25. What must be the magnitude of, so that the net work completed by it and the kine..
Use the equation of the position to find the potential elastic energy in a Simple Harmonic Motion(SHM). What would you need to do to find the elastic constant of a spring
The angle between the electric field vector and the vector normal to the rectangular plane is 65.0 degrees. Illustrate what is the electric flux through the rectangle?
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