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A cannon fires a cannon ball at 999.16 m/s in a straight line that passes directly over an observer's head. If the observer hears the sound of the cannon fire 2.47 seconds after he sees the cannon ball pass over his head, how far is the cannon from the observer? The temperature on this day is 14.99 oC.
Bronco Brown is mowing his lawn. He applies a force F along the handle of the lawnmower as shown. Bronco moves the mower at constant velocity.
A lens with a refrective index of 1.5 is coated with a material of refractive index of 1.2 in order to minimize the reflection. what is the thinnest possible coating
A roller coaster car of mass 250 kg has a speed of vo = 12 m/s at point A, located at a height of h = 15 m. find the speed of the car when it reaches point B. use energy ideas
q1. a 2.0 kg piece of wood slides on the surface. the curved lateral sides are perfectly smooth no resistance but the
What is the distance between town and johns present location
A weightlifter bench-presses a 170.0 kg barbell from his chest to a height equal the length of his arms 0.750 m. What is the potential energy of the barbell relative to the weightlifter\'s chest after he lifts the barbell
Three blocks, each having a mass of 1.16 kg, are connected by rigid rods of negligible mass and are supported by a frictionless surface, find the magnitude of the force applied by the rod on the left
A 10.0 g object moving to the right at 18.0 cm/s makes an elastic head-on collision with a 15.0 g object moving in the opposite direction at 27.0 cm/s
A 100 g granite cube slides down a 40* frictionless ramp. At the bottom, just as it exits onto a horizontal table, it collides with a 200g steel cube at rest. How high above the table must the granite cube be released to give the steel cube a spee..
You are pushing a 150-kg wooden crate in a straight line a distance of 4.5 m across a wooden floor. The crate is speeding up at 0.22 m/s2. What is the work done by friction on the crate
A 92 kg climber rappels down the rope applying friction with figure eight (piece of climbing equipment ) to reduce his his downward acceleration.
A runner's kinematics are being recorded to analyze gait. At a certain moment, the absolute angle of the trunk is 80°, What is the relative hip angle
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