Bicycle Carring
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Science Answers!?
1. Is it possible for a ball to have both kinetic and potential energy at the same time? Explain.
2. A dump truck, a sports car, and a bicycle are traveling at the same velocity. Compare their kinetic energies.
3. A 20-KG bicycle carring a 50-KG girl is traveling at a speed of 8 m/s. What is the kinetic energy of the girl and the bicycle?
4. Explain how energy is conserved when you throw a ball in the air and then catch it. be sure to talk about kinteic, gravitational potential and the law of conservation of energy.
My teacher gave us these formulas: KE=1/2(m)(v^2)
GPE= mgh g=9.8 m/s^2
Thank you everyone that can help me, even if its only with one answer! :]] Kayleigh! <33
1. no b/c something that is moving has kinetic energy and something that is not moving has potential energy and something cant be moving and not moving at the same time
2. ?
3.girl = ke=1/2(50)8^2
ke=25(64)
ke= 1600 J
bike= ke=1/2(20)8^2
ke=10(64)
ke=640 J
4.when you start of with the ball in your hand it has potential energy and since energy cant be created or destroyed(the law of consevation)when you throw the ball in the air all the PE turns into KE and when it reches its highest point it stops for a second and that is when it has its greatest amount of PE and then when the ball is on its way back to you it once again turns from PE to KE and when you catch it you are back to the beggining.
hope that helped i learned it this year in my science class and i am prety sure it is right(:
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jango topeak jb trb01 trailer travel bag 85 l bike new US $99.97
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