Collision Concepts

What is the equation for the conservation of momentum in an elastic collision?

• m1*v1_initial / m2*v2_initial = m1*v1_final / m2*v2_final

• m1*v1_initial - m2*v2_initial = m1*v1_final - m2*v2_final

• m1*v1_initial + m2*v2_initial = m1*v1_final + m2*v2_final

• m1*v1_initial * m2*v2_initial = m1*v1_final * m2*v2_final

Tags

NGSS.HS-PS2-2

In an elastic collision, what happens to the total kinetic energy of the system?

• Disappears

• Increases

• Decreases

• Remains constant

Define perfectly inelastic collision.

• A perfectly inelastic collision is a type of collision in which the objects repel each other after colliding.

• A perfectly inelastic collision is a type of collision in which the objects pass through each other without any interaction.

• A perfectly inelastic collision is a type of collision in which two objects stick together after colliding and move as one mass. Kinetic energy is not conserved in this type of collision.

• A perfectly inelastic collision is a type of collision in which the objects bounce off each other after colliding.

Tags

NGSS.HS-PS2-2

What is the equation for the conservation of momentum in a perfectly inelastic collision?

• m1*v1_initial * m2*v2_initial = (m1 + m2)*vf

• m1*v1_initial - m2*v2_initial = (m1 + m2)*vf

• m1*v1_initial + m2*v2_initial = (m1 + m2)*vf

• m1*v1_initial + m2*v2_initial = vf

Tags

NGSS.HS-PS2-2

In a perfectly inelastic collision, what happens to the total kinetic energy of the system?

• It decreases

• It becomes negative

• It increases

• It remains the same

What is the formula to calculate the final velocity of two objects after an elastic collision?

• v1f = ((m1 - m2) / (m1 + m2)) * v1i + ((2 * m2) / (m1 + m2)) * v2i, v2f = ((2 * m1) / (m1 + m2)) * v1i + ((m2 - m1) / (m1 + m2)) * v2i

• v1f = ((m1 - m2) / (m1 + m2)) * v1i + ((2 * m2) / (m1 - m2)) * v2i

• v1f = ((m1 + m2) / (m1 - m2)) * v1i + ((2 * m2) / (m1 + m2)) * v2i

• v1f = ((m1 - m2) / (m1 + m2)) * v1i - ((2 * m2) / (m1 + m2)) * v2i

Tags

NGSS.HS-PS2-2

How does the kinetic energy of a system change in an inelastic collision?

• The kinetic energy of the system decreases.

• The kinetic energy of the system becomes negative.

• The kinetic energy of the system remains constant.

• The kinetic energy of the system increases.

Explain the concept of conservation of energy in collisions.

• Conservation of energy in collisions means energy is lost during the collision

• Conservation of energy in collisions states that the total mechanical energy of the system remains constant.

• Conservation of energy in collisions only applies to elastic collisions

• Conservation of energy in collisions implies that the kinetic energy after the collision is greater than before

Tags

NGSS.HS-PS2-3

NGSS.HS-PS3-2

What is the difference between elastic and inelastic collisions in terms of kinetic energy?

• In elastic collisions, kinetic energy is lost, while in inelastic collisions, it is gained.

• In elastic collisions, kinetic energy is doubled, while in inelastic collisions, it remains the same.

• In elastic collisions, kinetic energy is transferred to potential energy, while in inelastic collisions, it is transferred to heat.

• The difference is that in elastic collisions, kinetic energy is conserved, while in inelastic collisions, kinetic energy is not conserved.

In an inelastic collision, what happens to the total momentum of the system?

• Doubles

• Remains constant

• Becomes negative

• Decreases

Tags

NGSS.HS-PS2-2