Chemistry: Kinetic Energy Problems = KE = 0.5m x 12 1. 5 kg wooden block moving at a speed of 2 m/s 2. 71kg man walking at 1.0 m/s 3. 71kg man running at 5.0 m/s 4. 1816kg car traveling at 25 m/s

I wanna say it’s C but i’m not sure...

Kinetic Energy Problems = KE = 0.5m x 12 1. 5 kg

pearfam98

13.02.2022

Explanation:

The kinetic energy of an object is given by :

$K=\dfrac{1}{2}mv^2$

1. Mass, m = 5 kg

Speed, v = 2 m/s

$K_1=\dfrac{1}{2}\times 5\times (2)^2\\\\=10\ J$

2. Mass, m = 71 kg

Speed, v = 1 m/s

$K_2=\dfrac{1}{2}\times 71\times (1)^2\\\\=35.5\ J$

3. Mass, m = 71 kg

Speed, v = 5 m/s

$K_3=\dfrac{1}{2}\times 71\times (5)^2\\\\=887.5\ J$

4. Mass, m = 1816 kg

Speed, v = 25 m/s

$K_4=\dfrac{1}{2}\times 1816\times (25)^2\\\\=567500\ J$

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