Momentum-higher Flashcards
1
Q
What is momentum?
A
the product of mass and velocity
2
Q
what is the unit of momentum?
A
kg m/s
3
Q
What is the momentum of a 15 kg dog running at 4m/s?
A
60 kg m/s
4
Q
what does conservation of momentum mean?
A
Total momentum before is equal to total momentum after.
5
Q
What is the momentum of a system at rest?
A
0 kg m/s
6
Q
What does mΔv represent?
A
The change of momentum
7
Q
What does change of rate mean?
A
Change per unit time
8
Q
What equation links force and change of momentum?
A
F = mΔv ÷ Δt
9
Q
Which car safety feature will not reduce the rate of change of momentum?
A
A roll cage
10
Q
How do seatbelts and airbags reduce forces in a collision?
A
They increase collision time, which reduces the rate of momentum.
