Y1 Ch 11 Momentum

Question 1

The more momentum something has …

Answer 1

The harder it is to stop.

Question 2

Momentum equation

Answer 2

mass*velocity

Question 3

If an object has more momentum it has …

Answer 3

more mass and/or velocity and therefore more kinetic energy.

Question 4

Units of momentum

Answer 4

Kgms^-1

Question 5

Conservation of linear momentum

Answer 5

The total momentum of a system will remain constant provided there are no external forces acting on the system.

Question 6

Collision definition

Answer 6

Objects coming together.

Question 7

Explosion definition

Answer 7

objects move apart.

Question 8

The equation for the conservation of momentum.

Answer 8

M1U1 + M2U2 = M1V1 + M2V2

Question 9

The only way to change the velocity of an object …

Answer 9

is to have a resultant force.

Question 10

Newton’s Second Law in terms of momentum

Answer 10

Change in momentum = force * time

Question 11

Impulse

Answer 11

force * time

Question 12

The area under the curve is

Answer 12

the change in momentum.

Question 13

If you increase the time of the collision

Answer 13

the impulse stays the same but the change of momentum is smaller so the force decreases.

Question 14

Elastic collisions

Answer 14

Both energy and momentum are conserved.

Question 15

Inelastic collisions

Answer 15

Only momentum is conserved.