Physics, 26.11.2019 02:31 kaitlynbrace9742
Jonathan is riding a bicycle and encounters a hill of height 7.30 m. at the base of the hill, he is traveling at 6.00 m/s. when he reaches the top of the hill, he is traveling at 1.00 m/s. jonathan and his bicycle together have a mass of 85.0 kg. ignore friction in the bicycle mechanism and between the bicycle tires and the road. (a) what is the total external work done on the system of jonathan and the bicycle between the time he starts up the hill and the time he reaches the top? (b) what is the change in potential energy stored in jonathan’s body during this process? (c) how much work does jonathan do on the bicycle pedals within the jonathan-bicycle-earth system during this process?
Answers: 3
Physics, 22.06.2019 05:30, gunnatvinson
What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?
Answers: 3
Physics, 22.06.2019 17:40, yoongnzl
Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.
Answers: 1
Physics, 22.06.2019 23:00, elenagarcia123
The statue of liberty is 305.5 feet high. when the angle of elevation of the sun is 50 , what is the distance to the tip of the shadow from a point at water level and directly below the highest point of the statue?
Answers: 3
Jonathan is riding a bicycle and encounters a hill of height 7.30 m. at the base of the hill, he is...
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