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kakasveta [241]
4 years ago
9

Determine the kinetic energy of a 575-kg roller coaster car that is moving with a speed of 16.0 m/s. __ J What is the kinetic en

ergy if the coaster was moving at twice the speed? ___ J The kinetic energy now is ___ times greater.
Physics
1 answer:
worty [1.4K]4 years ago
8 0
KE at 16m/s
==========
Givens
=====
m = 575 kg
v = 16 m/s

Formula 
======
KE = 1/2 m* v^2

KE = 1/2 575 * 16^2
KE = 73600

Second Question
=============
m = 575
v = 32 m/s

KE = 1/2 mv^2
KE = 1/2 575 * 32^2
KE = 294400

Third Question
===========
Ke2 = KE1 * k where k is the number of times greater the second is than the first.
294400 = k * 73600
k = 294400 / 73600
k = 4 So the KE of the second condition is 4 times the first.
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