8.1 Linear Momentum, Force, and Impulse
Can we use the equation when the mass is constant?
- No, because the given equation is applicable for the variable mass only.
- No, because the given equation is not applicable for the constant mass.
- Yes, and the resultant equation is F = mv
- Yes, and the resultant equation is F = ma
8.2 Conservation of Momentum
Why does a figure skater spin faster if he pulls his arms and legs in?
- Due to an increase in moment of inertia
- Due to an increase in angular momentum
- Due to conservation of linear momentum
- Due to conservation of angular momentum
8.3 Elastic and Inelastic Collisions
What approach would you use to solve problems involving 2D collisions?
- Break the momenta into components and then choose a coordinate system.
- Choose a coordinate system and then break the momenta into components.
- Find the total momenta in the x and y directions, and then equate them to solve for the unknown.
- Find the sum of the momenta in the x and y directions, and then equate it to zero to solve for the unknown.