SAT High School

a small bullet is fired into a large piece of wood. after the bullet penetrates the wood, the assembly moves as one unit along a low-friction track in the direction of travel of the bullet.

Answers

Answer 1

When a small bullet is fired into a large piece of wood, the bullet's kinetic energy is transferred to the wood, causing it to move. This movement occurs due to the conservation of momentum principle, which states that the total momentum of a system remains constant unless an external force acts on it.

Initially, the bullet has momentum in one direction, and the wood has no momentum. When the bullet hits the wood, it transfers its momentum to the wood, causing the wood to start moving in the same direction as the bullet. The bullet's momentum decreases as it slows down due to the force of friction between it and the wood.

The wood and the bullet then move together as one unit along the low-friction track. This happens because there is no external force acting on the system to change its momentum. The low-friction track reduces the effects of friction and air resistance, allowing the wood and bullet to maintain their velocity for a longer period.

The final velocity of the wood and the bullet depends on the mass of the wood, the mass and velocity of the bullet, and the amount of energy transferred during the impact. The wood will continue to move until it encounters a force that is strong enough to stop it.

Learn more about kinetic energy at https://brainly.com/question/30388607

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