Blue is pulling 100n harder
Answer: 26.67 m/s
Explanation:
Given
Length traveled by the ball 
Time taken to reach the goal post is 
Initial velocity 
Using the second equation of motion

Now using

The velocity of ball will be 26.67 m/s
Answer:
Explanation:
The change in force = 9.81(1.95 - 0.300) = 16.2 N
The change in length is 0.750 - 0.200 = 0.550 m
K = ΔF/Δx = 16.2/0.550 = 29.4 N/m