Question

calculate kinetic energy possessed by a uniformly moving body of 40 kg mass if it covers 800m in 40 seconds



i don't know the process but answer is 1200 Joule
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Answer 1

Answer:

       K.E = 8000 J

Explanation:

• mass (m) = 40kg
• distance = 800m
• time = 40 seconds

velocity = distance / time = 800 / 40

velocity  = 20m/s

• v = 20m/s

K.E = 1/2mv²

K.E = 1/2 × 40 × (20)²

K.E = 20 × 400

K.E = 8000 J