Conservation of Momentum

The momentum of an object is a vector, therefore velocity, mass, and ____ are equally important.

• acceleration
• direction
• gravity
• distance

The total momentum before two or more objects interaction (collision) will be ______ the total momentum after the interaction (collision) if no energy is lost.

• less than
• greater than
• equal to

Select the best equation that would help solve the problem:
Ball A and Ball B have the same mass. Ball A rolls and collides with Ball B at rest. Ball A rolls with some velocity after the collision, what is the velocity of Ball B?

• Δp = mv
• p = mv
• (before) m_Av_A + m_Bv_B = m_Av_A + m_Bv_B (after)
• (before) m_Av_A + m_Bv_B = (m_A + m_B)v (after)

Select the best equation that would help solve the problem:
An arrow collides and sticks with a target that is hanging on a string with negligible mass. To find the velocity of the arrow and target after the collision.

• Δp = mv
• p = mv
• (before) m_Av_A + m_Bv_B = m_Av_A + m_Bv_B (after)
• (before) m_Av_A + m_Bv_B = (m_A + m_B)v (after)

When a canon fires a canon ball, the explosion inside the canon exerts a greater force on...

• the cannon
• the cannon ball
• neither, the force is the same

Before the canon fires a cannon ball, both sit at rest. A person can confidently say the total momentum is...

• zero
• non-zero

The canon ball has a mass of m and the cannon has a mass of 100m. After the canon ball is fired from the canon, the greater acceleration is experienced by...

• the canon due to its very low mass
• the canon due to its very high mass
• the canon ball due to its very low mass
• the canon ball due to its very high mass

The canon ball has a mass of m and the cannon has a mass of 100m. After the canon ball is fired from the canon, the greater change in velocity is experienced by...

• the canon due to its very low mass
• the canon due to its very high mass
• the canon ball due to its very low mass
• the canon ball due to its very high mass

The canon ball has a mass of m and the cannon has a mass of 100m. After the firing of the canon ball, the object with the greater momentum is...

• the canon
• the cannon ball
• neither, both have equal magnitudes of momentum

The canon ball has a mass of m and the cannon has a mass of 100m. After the firing of the canon-canon ball system, the total momentum after the explosion is ____ compared to the total momentum before the explosion (with no loss of energy)

• greater than
• less than
• the same