An airplane lands and begins to slow down as it moves along the runway. If its mass is 5.50 x 10kg and the braking force is 7.50 x 109 N, what is the acceleration of the airplane?
Provide your answer in m/s2

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

Which of these statements is true? a. quarks pair with leptons to form protons and neutrons. b. quarks pair with bosons to form photons. c. quarks pair with photons to form protons and neutrons. d. quarks pair with other quarks to form protons and neutrons. e. quarks pair with electrons to form protons.

What property of an object determines its inertia?