Answer:
3
3.75
Step-by-step explanation:
First ball
Givens
a = 5m/s^2
m = ??
F = 15N
Formula
F = m*a
Solution
15 = m * 5
15/5 = m
m = 3 kg
Second ball
a = 4m/s^2
15 = m * 4
15/4 = m
m = 3.75 kg
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