Calculate why the mechanical energy for a 10g bullet flying 10m at a speed of 36 km / h.

univerkov | September 12, 2021 | education

Task data: m (mass of a flying bullet) = 10 g (in SI m = 10 * 10-3 kg); h (bullet flight height) = 10 m; V (speed of a given bullet) = 36 km / h (in SI V = 10 m / s).

Reference values: g (acceleration due to gravity) ≈ 10 m / s2.

The total mechanical energy of a given bullet is determined by the formula: E = En + Ek = m * g * h + m * V ^ 2/2.

Let’s make a calculation: E = 10 * 10 ^ -3 * 10 * 10 + 10 * 10 ^ -3 * 10 ^ 2/2 = 1.5 J.

Answer: The given bullet has a total energy of 1.5 J.

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