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A man leaves the garrage in his house and drives to a neighbouring town which is twenty kilometres away from his house on sight-seeing. He returns home to his garrage two hours after. What is his average velocity from home in km/h?
A gymnast is performing a floor routine. In a tumbling run shespins through the air, increasing her angular velocity from 3.00 to4.30 rev/s while rotating throughthree-fourths of a revolution. How much time does this maneuver take
What is the smallest thickness of a soap film (n = 1.33) that would appear black if illuminated with 450 -nm light? suppose there is air on both sides of the soap film.
A device known as Atwood\'s machine consists of two masses hanging from the ends of a vertical rope that passes over a pulley. Assume the rope and pulley are massless and there is no friction in the pulley.
A 18.4 kg cart traveling at 5.63 m/s (this movement defines thepositive direction) has a head on perfectly inelastic collision with a 6.9 kg cart traveling at 7.06 m/s. How much kineticenergy is lost in the collision?
there are two small objects charged that repel each other they both have a force f and are separated by a distance d.
Two buckets of nails are hung one above the other and pulled up to a roof by a rope. Each bucket of nails has a mass of 5.0kg. The action-reaction force between the buckets is 60N. Calculate the acceleration and the force applied by the worker lif..
At the end of an amusement park ride, you want the gondola to stop without the acceleration exceeding 2 g's. what is the maximum allowed braking force
A man pushes a lawn mower on a level lawn by a force of 215 N. If 31% of this force is directed downward, and 50 W of power is expanded in pushing the mower 5.8 m, how much time is spent in pushing the mower this distance?-------s
A person pulls a 26kg suitcase using a rope attached to the suitcase at an angle of 28 degrees to the horizontal. The coefficient of static friction of the suitcase with the floor is 0.3 and the coefficient of kinetic friction is 0.20.
questionthough 0 is often referred to as lower threshold of human hearing it is important to realize that the human ear
You are asked to create an Excel Spreadsheet to solve the following problem. How long does the trolley track need to be and how long will it take from t=0 until the load is lifted 3 feet?
A fan at a rock concert is 30.0 m from the stage, and at this point the sound intensity level is 109dB. Sound is detected when a sound wave causes the tympanic membrane (the eardrum) to vibrate . Typically, the diameter of this membrane is about 8..
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