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13. Newton's Second Law states that acceleration is directly proportional to __ and inversely proportional to __ 14. When a person jumps, they push down on Earth with a force that is __ to the force Earth exerts on them. Multiple Choice Questions 15. Which force pair represents Newton's Third Law? a) Weight and normal force on the same object b) Force of a person pushing a wall and wall pushing back c) Friction and gravity on a sliding object d) Weight and air resistance on a falling object 16. If the net force on an object is zero, the object must be: a) At rest b) Moving with constant velocity c) Either at rest or moving with constant velocity d) Accelerating 17. What happens to acceleration if the force is doubled and mass is halved? a) Remains the same b) Doubles c) Quadruples d) Becomes one-fourth 18. The force that always opposes motion between surfaces is: a) Normal force b) Gravitational force c) Friction d) Tension 19. A spacecraft in space far from any planets moves with constant velocity This is an example of: a) Newton's First Law b) Newton's Second Law c) Newton's Third Law d) Conservation of Energy

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13. Newton's Second Law states that acceleration is directly proportional to __ and inversely proportional to __ 14. When a person jumps, they push down on Earth with a force that is __ to the force Earth exerts on them. Multiple Choice Questions 15. Which force pair represents Newton's Third Law? a) Weight and normal force on the same object b) Force of a person pushing a wall and wall pushing back c) Friction and gravity on a sliding object d) Weight and air resistance on a falling object 16. If the net force on an object is zero, the object must be: a) At rest b) Moving with constant velocity c) Either at rest or moving with constant velocity d) Accelerating 17. What happens to acceleration if the force is doubled and mass is halved? a) Remains the same b) Doubles c) Quadruples d) Becomes one-fourth 18. The force that always opposes motion between surfaces is: a) Normal force b) Gravitational force c) Friction d) Tension 19. A spacecraft in space far from any planets moves with constant velocity This is an example of: a) Newton's First Law b) Newton's Second Law c) Newton's Third Law d) Conservation of Energy

13. Newton's Second Law states that acceleration is directly proportional to __ and inversely proportional to __ 14. When a person jumps, they push down on Earth with a force that is __ to the force Earth exerts on them. Multiple Choice Questions 15. Which force pair represents Newton's Third Law? a) Weight and normal force on the same object b) Force of a person pushing a wall and wall pushing back c) Friction and gravity on a sliding object d) Weight and air resistance on a falling object 16. If the net force on an object is zero, the object must be: a) At rest b) Moving with constant velocity c) Either at rest or moving with constant velocity d) Accelerating 17. What happens to acceleration if the force is doubled and mass is halved? a) Remains the same b) Doubles c) Quadruples d) Becomes one-fourth 18. The force that always opposes motion between surfaces is: a) Normal force b) Gravitational force c) Friction d) Tension 19. A spacecraft in space far from any planets moves with constant velocity This is an example of: a) Newton's First Law b) Newton's Second Law c) Newton's Third Law d) Conservation of Energy

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13. La Segunda Ley de Newton establece que la aceleración es directamente proporcional a la **fuerza neta** e inversamente proporcional a la **masa**.<br /><br />14. Cuando una persona salta, empuja hacia abajo a la Tierra con una fuerza que es **igual y opuesta** a la fuerza que la Tierra ejerce sobre ella.<br /><br />**Preguntas de opción múltiple:**<br /><br />15. ¿Qué par de fuerzas representa la Tercera Ley de Newton?<br />b) Fuerza de una persona empujando una pared y la pared empujando hacia atrás<br /><br />16. Si la fuerza neta sobre un objeto es cero, el objeto debe estar:<br />c) Ya sea en reposo o moviéndose con velocidad constante<br /><br />17. ¿Qué sucede con la aceleración si la fuerza se duplica y la masa se reduce a la mitad?<br />c) Se cuadruplica<br /><br />18. La fuerza que siempre se opone al movimiento entre superficies es:<br />c) Fricción<br /><br />19. Una nave espacial en el espacio, lejos de cualquier planeta, se mueve con velocidad constante. Este es un ejemplo de:<br />a) Primera Ley de Newton<br />
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