Question

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

Answer 1

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★ 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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Answer 2

Answer:

Gɪᴠᴇɴ :-

Speed of bullet = 200 m/s

Kinetic energy ( K.E ) = 10⁵J

Tᴏ Fɪɴᴅ :-

Mass of bullet = ?

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

THANKS