12. What differentiates balanced forces from action-reaction forces?
A. The forces are equal in size.
B. The forces act on different objects. C. The forces act upon same object.
D. The forces opposite on each other in terms of direction. MORI
13. An force must act on an object for it to CHANGE it's motion UDTE SOS C. Gravitational D. Electrical A Balanced B. Unbalanced
14. What is the net force in this picture? A. 50 Newtons to the right B. 950 Newtons to the right C. 950 Newtons to the left D. 50 Newtons to the left 500 Newtons 450 Newtons 急急
15. What will cause an object to move? A. Applied forces 100 C. Unbalanced forces B. Balanced forces D. Frictional force
16. Which of these examples demonstrate balance forces? A. A car sliding on ice. USD B. A car hitting a telephone pole. gos ond C. A roller coaster going down the first drop. D. A tug-of-war game in which no one wins.
17. Which of these force diagrams demonstrates an object in motion? 15Noua 5N 5N C. A. non 5N Ganan B. 5N 5N D. 15N 5N 1ON
18. When the net force of an object is equal to zero, then the forces are said to be A. Gravitational C. Air - resistance force B. Balance force D. Unbalance Force
19. With unbalanced forces, the object will move in the direction of the force. A. larger C. equal B. smaller D. cannot be determined
20. Jonny and Patty are pushing against a basketball. Both of them push against the ball on opposite sides with a force of 20 N to keep the ball still. What is the net force? A 400 N B. 24 N CON D. 40 N​