Answer:
E) e
Explanation:
Impulse is equal to the product between the force applied (F) and the time interval of the collision (
):

This means that we can calculate the force for each collision dividing the impulse by the time interval:

Let's apply the formula to each case:
A) 
B) 
C) 
D) 
E) 
Therefore, the force is the maximum for collision E).
35 m because if you count the space he took back it’s equivalent to 15 meters and so 20 + 15 = 35
By parallel axis theorem, mr^2 + mr^2 = 2mr^2