- #1
jinkyfishies
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Homework Statement
1. a light pingpong ball and a heavier baseball bat are thrown vertically upwards. compare their initial kinetic energies and initial velocities if both balls reach the same maximum height.
2. a rollercoaster is designed with its first hill of height 75m. at the bottom of the hill the velocity is 33m/s. does the speed at the bottom make sense? explain using a calculation if needed
3. compare the performance of a fast sports car (porsche) to a slower fuel efficient toyota corolla using the concept of power.
Homework Equations
ek=1/2mv^2
eg=mgh
p=w/t
The Attempt at a Solution
1. i think the heavier one will have a greater kinetic energy and a higher velocity
2. i think it doesn't make sense because mgh=1/2mv^2
9.81×75=0.5(33^2)
735.75=544.5
since theyre not equal it wouldn't make sense
3. i just have no idea