Describe the net force acting on the object 100 n to the right 200 n to the left 400 n to the right 300 n to the left

Can somebody explain to me how newton's 3rd law relates to momentum? ~ap physics 1

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

Balloon a has charge q, and identical mass balloon b has charge 10q. you hang them from threads near each other. choose all of the statements with which you agree. check all that apply. a. a and b exert the same magnitude forces on each other. b. the force that a exerts on b is 10 times the force that b exerts on a. c. the angle between the thread supporting a and the vertical is < the angle between the thread supporting b and the vertical. d. the force that a exerts on b is 1/10 the force that b exerts on a.