Conservation of momentum

When two objects collide, the P_before is ____________ the P_after.

• more than 
• less than 
• equal to
• unrelated to

Tags

NGSS.HS-PS2-2

Collisions where objects BOUNCE apart.

• inelastic collisions

• elastic collisions

• explosions

• none of these

Tags

NGSS.HS-PS2-2

Collision where objects collide and stick together.

• inelastic collision

• elastic collision

• explosion

• none of these

Tags

NGSS.HS-PS2-2

What is the TOTAL MOMENTUM for the system BEFORE COLLISION? Motion to the RIGHT is + and to the LEFT is -

• 14 Kg x m/s

• 10 Kg x m/s

• 24 Kg x m/s

• -24 Kg x m/s

Tags

NGSS.HS-PS2-2

What will the TOTAL MOMENTUM be AFTER COLLISION? Motion to the RIGHT is + and to the LEFT is -

• 12 Kg x m/s

• 10 Kg x m/s

• 24 Kg x m/s

• -24 Kg x m/s

Tags

NGSS.HS-PS2-2

If the two cars have an ELASTIC COLLISION, which direction (if any) will they move? Motion to the RIGHT is + and to the LEFT is -

• They will BOUNCE OFF and move LEFT

• They will BOUNCE OFF and move RIGHT

• They will STICK TOGETHER and move LEFT

• They will STICK TOGETHER and move RIGHT

Tags

NGSS.HS-PS2-2

If the cars collided inelastically, how would they move afterward (if at all)? Motion to the RIGHT is + and to the LEFT is -

• They would bounce off and move LEFT

• They would bounce off and move RIGHT

• They would stick together and move LEFT

• They would stick together and move RIGHT

Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-1

During an inelastic collision, what would happen to the velocity of the cars since they are now stuck together? Motion to the RIGHT is + and to the LEFT is -.

• Velocity INCREASES

• Velocity DECREASES

• Velocity remains the SAME

Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-1

A 10kg ball moving at 13 m/s strikes a 20kg ball at rest. After the collision, the 10kg ball is moving with a velocity of 7 m/s. What is the velocity of the second ball?

• 3 m/s

• 12 m/s

• 6 m/s

• 4 m/s

Tags

NGSS.HS-PS2-2

In a two-body collision,

• momentum is always conserved

• kinetic energy is always conserved

• neither momentum nor kinetic energy is conserved

• both momentum and kinetic energy are always conserved

Tags

NGSS.HS-PS2-2