4. The average Olympic runner has a mass of 67.8 kg and accelerates at 10.38
m/s2. What is the force accelerated by an Olympic runner?

Kelly has come up with an explanation for why her sister is sometimes in a good mood and other times in a bad mood. she speculates that it is based on the hours of sleep her sister got the previous night. this explanation for her sister's behaviors is an example of a(n)