A ballistics test involves firing a 10.0g bullet horizontally into a 1.50kg wood block that is initially at rest. The bullet becomes lodged in the block, and you determine that they move together at a speed of 5.00m/s. With this information, determine the velocity of the bullet before it entered the block.

Question

Physics

Adkins

27 September, 08:08

A ballistics test involves firing a 10.0g bullet horizontally into a 1.50kg wood block that is initially at rest. The bullet becomes lodged in the block, and you determine that they move together at a speed of 5.00m/s. With this information, determine the velocity of the bullet before it entered the block.

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Answers (1)

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Waters · Answer 1

u = 755 m/s

Explanation:

Lets take

Velocity of bullet = u m/s

The velocity of system after collision, v = 5 m/s

m = 10 g = 0.01 kg

M = 1.5 kg

From linear momentum conservation (because there is no any external force on the system)

Pi = Pf

m u = (m + m) v

0.01 x u = (1.5 + 0.01) x 5

u = 755 m/s