What is the kinetic energy of a 0.5 kg soccer ball that’s traveling at a speed of 3m/s

K.E is 2.25 J

Explanation:

Data :

Mass = m = 0.5 kg

Velocity = v = 3 m/s

Formula for K.E

K.E = 1/2mv²

Put values

K.E = 1/2(0.5)(3)² = 2.25 J

Explanation:

Ke=1/2mv2

Ke= 1/2(0.5kg)(3m/s)²

Ke = 2.25 J

when it gains or loses electrons

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.