Conservation Laws

Which of the following correctly defines momentum?

• mass in motion
• how difficult it is to stop a body
• product of a body's mass and velocity
• all of these are correct

Tags

NGSS.HS-PS2-2

What are the units of momentum?

• kg

• m/s

• kg⋅m/s

• J

What is the momentum of a charging rhino?

• 2 × 10² kg⋅m/s
• 3 × 10² kg⋅m/s
• 2 × 10⁴ kg⋅m/s
• 3 × 10⁴ kg⋅m/s

Tags

NGSS.HS-PS2-2

The momentum of object A is 8 kg⋅m/s. What is the momentum of object B?

• 4 kg⋅m/s
• 8 kg⋅m/s
• 16 kg⋅m/s
• 32 kg⋅m/s

Tags

NGSS.HS-PS2-2

Which of the following correctly defines impulse?

• change of momentum
• force over time
• magnitude of impact
• all of these are correct

Tags

NGSS.HS-PS2-2

The graph shows how the force on an object varies over time. What is the impulse caused by this force? (The impulse is the area under the curve.)

• 0.8 Ns

• 1.6 Ns

• 2.4 Ns

• 8 Ns

Under what condition is momentum conserved?

• Momentum is always conserved no matter what.
• When an unbalanced force is applied on the system.
• When the net external force is less than the net internal force.
• When the net force on the system is zero.

Tags

NGSS.HS-PS2-2

For which of these collisions is momentum conserved?

• Only D
• A, B, and C
• All of them
• None of them

Tags

NGSS.HS-PS2-2

For the collision shown in the picture, what is the missing momentum?

• -8 kg⋅m/s
• 0 kg⋅m/s
• 8 kg⋅m/s
• 12 kg⋅m/s

Tags

NGSS.HS-PS2-2

The two blocks shown collide and stick together. What is their momentum after the collision?

• 5 kg m/s
• 10 kg m/s
• 25 kg m/s
• 30 kg m/s

Tags

NGSS.HS-PS2-2