Answer to Question #114537 in Physics for Harley moyer

Question

A 90 kg running back accelerates at 5m/s^2 he collides at the goal line with a 105 kg linebacker who accelerates at 4m/s^2

Answer 1

$$F=m_1a_1-m_2a_2$$

$$F=(90)(5)-(105)(4)=30\ N$$