collisions, momentum and explosions

Question 1

what is the symbol for momentum

Answer 1

P

Question 2

P =

Answer 2

m V

Question 3

momentum is a ______ quantity, and the direction of the momentum is the same as the direction of the ______

Answer 3

vector
velocity

Question 4

what is the law of conservation of momentum

Answer 4

the total momentum before a collision is equal to the total momentum after the collision, in the absence of external forces

Question 5

what is the formula for calculating the velocity of collisions

Answer 5

m1u1 + m2u2 = m1v1 + m2v2

Question 6

what is an elastic collision

Answer 6

Both momentum and kinetic energy are conserved. The kinetic energy before and after the collision is the same.

Question 7

what is an inelastic collision

Answer 7

momentum is conserved but kinetic energy isn’t. The kinetic energy after the collision is either greater or less than the kinetic energy before.

Question 8

change in momentum =

Answer 8

mv - mu

Question 9

what is impulse

Answer 9

F t

Question 10

how do you calculate impulse

Answer 10

F t = (mv - mu)

Question 11

what does the area under a force - time graph equal ?

Answer 11

impulse

Question 12

What is newtons 3rd law

Answer 12

That for every action there is an equal and opposite reaction