EOY REVIEW 3 (Momentum/Collisions/Impulse)

Impulse & Collisions Review (EOY REVIEW 3)

By KAILEY MARTIN

Drag and Drop

In Elastic collisions​ ​

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are/is conserved ​and objects

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In inelastic collisions ​

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is conserved and objects ​

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Drag these tiles and drop them in the correct blank above

KE and momentum

bounce off of each other

only momentum

stick together

energy is lost

velocity is always conserved

Match

Match the following scenario with the concept

• Football player tackled and stops moving

• Two pool balls bounce off each other

• Increasing mass or velocity

• Long contact time during collision

• Short contact time during collision

Inelastic collision

Elastic collision

Increases momentum

Decreases force

Increases force

• Inelastic collision

• Elastic collision

• Increases momentum

• Decreases force

• Increases force

Multiple Choice

The diagram shows Stanley's 2 kg car moving to the right and a 3 kg car moving to the left on a horizontal, frictionless surface. When the two cars collide they lock together. What is the total momentum of the two-car system after the collision?

p_T=(m₁v₁)+(m₂v₂)

Show your work in your notebook!

• 20 kgm/s

• -20 kgm/s

• 4 kgm/s

• -4 kgm/s

Multiple Choice

WRITE THIS IN YOUR NOTEBOOK AND SHOW YOUR WORK

Scenario: A suction cup dart (0.05 kg) hits a stationary cart (0.5 kg) and they move together at 0.8 m/s. What is the total momentum?

p_T=(m1+m2)⋅v

• 0.22 kg⋅m/s

• 0.33 kg⋅m/s

• 0.44 kg⋅m/s

• 0.55 kg⋅m/s

Multiple Choice

WRITE THIS IN YOUR NOTEBOOK AND SHOW YOUR WORK

What was the velocity of the dart before hitting the cart?

p_T=(m₁v₁)+(m₂v₂)

• 6.60 m/s

• 8.80 m/s

• 7.70 m/s

• 5.50 m/s

Multiple Choice

WRITE THIS IN YOUR NOTEBOOK AND SHOW YOUR WORK

What is the impulse experienced by the dart?

J = Δp (the change in momentum)

J = m × (v_f-v_i)

• 0.044 Ns

• 0.40 Ns

• 0.64 Ns

• 1.00 Ns