Question

. A bullet is moving with a speed of 200 m/s. If its kinetic energy is 10⁵ J. Then its mass will be

(a) 50 grams

(b) 100 grams

(c) 5 grams

(d) None of These

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Answer 1

Answer:

100 gram

Explanation:

because 200 metre per second..

Answer 2

Answer:

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Explanation:

★ Gɪᴠᴇɴ :-

   Speed of bullet = 200 m/s

   Kinetic energy ( K.E ) = 10⁵J

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★ Tᴏ Fɪɴᴅ :-

   Mass of bullet = ?

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★ Sᴏʟᴜᴛɪᴏɴ :-

Finding mass of bullet using ,

K.E = 1/2 mv²

Where

   K.E → kinetic energy = 10⁵ J

   m → mass = ?

   v → speed = 200 m/s

Substituting the values we have,

➽ 10⁵ = 1/2 × (m) × (200)²

➽ 2 × 10⁵ = 40000m

➽ 2 × 100000 = 40000m

➽ 200000 = 40000m

➽ m = 200000 ÷ 40000

➽ Mass of bullet = 5 kg

Hence , mass of bullet = 5 kg

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