Question

What is the kinetic energy of a 38g soccer ball that is traveling at a speed of 80. m/s? Convert

Answer 1

m=0.038kg

v=80m/s

Kinetic energy

• 1/2mv²
• 1/2(0.038)(80)²
• 6400(0.038)/2
• 3200(0.038)
• 121.6J

Answer 2

• 1.52 J

Step-by-step explanation:

Kinetic energy formula

• K.E. = 1/2mv²

Given

• m = 38 g = 0.038 kg [kg is standard unit]
• v = 80 m/s

Solving

• K.E. = 1/2 x 0.038 x 80
• K.E. = 40 x 0.038
• K.E. = 1.52 J