Define the term linear momentum.
Use Fig. 2.2 to determine how long the blocks are in contact with each other.
Describe, without calculation, how the magnitude of the acceleration of block $Y$ behaves from time $t = 80\,\text{ms}$ to $t = 100\,\text{ms}$.
Describe, without calculation, how the magnitude of the acceleration of block $Y$ behaves from time $t = 100\,\text{ms}$ to $t = 120\,\text{ms}$.
Use Fig. 2.2 to determine the magnitude of the force exerted by block $X$ on block $Y$.
On Fig. 2.2, sketch how the momentum of block $X$ varies with time $t$ from $t = 0$ to $t = 160\,\text{ms}$.
Describe, without calculation, how the magnitude of the acceleration of block $Y$ varies from time $t = 80\ \text{ms}$ to $t = 100\ \text{ms}$.
Describe, without calculation, how the magnitude of the acceleration of block $Y$ changes from time $t = 100\ \text{ms}$ to $t = 120\ \text{ms}$.