Check Your Understanding

3. 

What is linear momentum?

1. the sum of a system’s mass and its velocity
2. the ratio of a system’s mass to its velocity
3. the product of a system’s mass and its velocity
4. the product of a system’s moment of inertia and its velocity

4. 

If an object’s mass is constant, what is its momentum proportional to?

1. Its velocity
2. Its weight
3. Its displacement
4. Its moment of inertia

5. 

What is the equation for Newton’s second law of motion, in terms of mass, velocity, and time, when the mass of the system is constant?

1. 𝐅net=Δ𝐯Δ𝑚Δ𝑡Fnet=ΔvΔ�Δ�
2. 𝐅net=𝑚Δ𝑡Δ𝐯Fnet=�Δ�Δv
3. 𝐅net=𝑚Δ𝐯Δ𝑡Fnet=�ΔvΔ�
4. 𝐅net=Δ𝑚Δ𝐯Δ𝑡Fnet=Δ�ΔvΔ�

6. 

Give an example of a system whose mass is not constant.

1. A spinning top
2. A baseball flying through the air
3. A rocket launched from Earth
4. A block sliding on a frictionless inclined plane