Terminal velocity and momentum

Question 1

what is terminal velocity

Answer 1

when object falls through a liquid
-object accelerates due to force of gravity
-as it speeds up resistive force increases
-resultant force reaches 0, object will fall at a steady speed

Question 2

Near the earth’s surface what is the acceleration due to gravity

Answer 2

10(m/s^2)

Question 3

what is newtons third law

Answer 3

for every action there’s an equal and opposite reaction

Question 4

what’s the equation for momentum?

Answer 4

momentum(kg m/s) = mass(kg) x velocity(m/s)

Question 5

whats the equation for change in momentum

Answer 5

force x time
change in momentum occurs when an unbalanced force acts on an object thts moving

Question 6

force equals that rate of change in momentum. consider a safety device

Answer 6

reduce forced by increasing time over which change of momentum takes place

Question 7

in a closed system, what can be said about the momentum before and after collision?

Answer 7

total momentum before is equal to total momentum afterwards
rate of change of momentum = to force experienced in Collison