You are on roller blades on top of a small hill. Your potential energy is equal to 1,000.0 joules. The last time you checked your mass was 60.0 kilograms. What is your weight in newtons?
Answers
Answer:
You are on roller blades on top of a small hill. Your PE is 1,000.0 Joules. The last time you check your mass was 60.0 kg. What is the height of the hill?
if you start skating down this hill, your poetntial energy will be converted to kinetic. At the bottom of the hill, the kinetic energy will be equal ot your potential energy at the top. What will be your speed at the bottom of the hill? What is a Joule?
Explanation:
A Joule is the energy used to apply i Newton for 1 meter. J = Nm
A Newton is the force needed to accelerate 1 km at the rate of 1m/s^2. That is, to increase its velocity by 1m/s every second.
PE = mgh
1000 = 60*9.8*h
h = 1.7m (small hill indeed!)
KE = 1/2 mv^2
1000 = 1/2 * 60 * v^2
v^2 = 33.333
v = 5.77m/s
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