Forces

Flash Card Questions Based on Newton’s Laws of Motion Review

Mass, Inertia, Weight, and Newton's First Law of Motion

  • What is inertia?

  • Do all objects have inertia?

  • How does the mass of an object affect its inertia?

  • Does a fast-moving object have more inertia than a slow-moving object?

  • What is the standard metric unit of mass?

  • Is mass dependent on gravity?

  • How is mass related to weight?

  • Can mass be measured in pounds?

  • What does weight measure?

  • How does gravity affect the weight of an object?

  • Would an object weigh less on the Moon than on Earth?

  • What is the force of gravity acting on an object called?

  • What happens to an object when balanced forces act on it?

  • What is required to change the motion of an object?

  • What does Newton’s First Law state about objects at rest or in motion?

  • Does a moving object require a force to keep moving at constant velocity?

Force, Acceleration, and Newton's Second Law of Motion

  • What is a force?

  • Is force a vector or scalar quantity?

  • Can an object experience multiple forces and not accelerate?

  • What is the metric unit of force?

  • According to Newton's Second Law, what does acceleration depend on?

  • If net force increases and mass stays the same, what happens to acceleration?

  • If mass increases and net force stays the same, what happens to acceleration?

  • What is the formula for Newton's Second Law?

  • If an object is accelerating to the right, in which direction is the net force?

  • If an object is moving right but slowing down, which way is the net force?

  • How do you calculate the net force required to accelerate a 2-kg object from rest to 6 m/s in 3 seconds?

Newton's Third Law and Force Pairs

  • What does Newton's Third Law state?

  • Why don't action and reaction forces cancel each other out?

  • When you sit on a chair, what is the reaction force to gravity acting on you?

  • When a golf club hits a ball, how does the force on the ball compare to the force on the club?

  • In the same scenario, which accelerates more: the ball or the club?

Application and Problem Solving

  • What is Big Bubba’s mass on the Moon if it is 100 kg on Earth?

  • If Little Billie weighs 360 N on Earth, what is their mass on the Moon?

  • True or False: An object moving rightward always has a rightward force acting on it.

  • How much net force is needed to keep a 5-kg object moving rightward at constant velocity?

  • According to Newton’s Laws, what must be true of the forces acting on an object moving at constant speed in a straight line?

  • What happens to the net force when an object moves at constant velocity?

Force Diagrams and Motion Analysis

  • In a velocity-time graph, during which intervals are the forces balanced?

  • In a dot diagram, during which intervals is there a net force acting on the object?

  • How do you determine the direction of the net force from a motion diagram?

Force-Mass-Acceleration Relationships

  • What is the net force on a 2-kg box in free fall?

  • What forces act on a box falling at terminal velocity?

  • If a box is pushed with an 8-N force and encounters 5 N of friction, what is the net force?

  • If a freight elevator descends at constant velocity, what can you say about the net force?

Quantitative Problems

  • How do you calculate the acceleration of a skydiver given mass and air resistance?

  • If a 1.05-kg object is pushed with 5.20 N, what is its acceleration?

  • If friction is present, how does it affect the acceleration of an object?

  • How do you find the applied force needed to overcome friction and accelerate an object?

  • How do you calculate the average resistive force on a car that stops over a given time?

  • How do you determine the resistive force acting on a glider slowing down on an air track?