Unit 3 Review

What does the term 'reaction' mean in Newton's Third Law of Motion?

• A force that occurs in the same direction as the action force.

• The equal and opposite force that occurs in response to an action force.

• A force that only acts on stationary objects.

• A force that is always greater than the action force.

What does a dot diagram represent in motion analysis?

• A visual representation of an object's position at equal time intervals, helping to analyze its motion.

• A graph showing the speed of an object over time.

• A chart that displays the acceleration of an object in a straight line.

• A diagram illustrating the forces acting on an object.

What is the definition of 'constant velocity'?

• Constant velocity means that an object is moving at a steady speed in a straight line without changing its direction.

• Constant velocity refers to an object that is accelerating in a circular path.

• Constant velocity indicates that an object is at rest and not moving at all.

• Constant velocity means that an object is moving at varying speeds in different directions.

What is the relationship between force, mass, and acceleration?

• F = m + a

• F = m - a

• F = ma

• F = m / a

What is the formula for calculating force?

• F = mv

• F = ma

• F = m/a

• F = m + a

What does it mean when an object is 'getting slower'?

• The object's velocity is increasing over time.

• The object's velocity is constant over time.

• The object's velocity is decreasing over time.

• The object is changing direction.

What is an example of balanced forces?

• A tug of war where both sides pull equally, resulting in no movement.

• A car accelerating down a hill.

• A person pushing a stationary wall with all their strength.

• A balloon flying away when released.

What is inertia?

• Inertia is the tendency of an object to resist changes in its state of motion.

• Inertia is the force that causes an object to accelerate.

• Inertia is the measure of an object's mass.

• Inertia is the energy possessed by a moving object.

What is an example of an action-reaction pair?

• A swimmer pushes water backward, and the water pushes the swimmer forward.

• A car accelerates and the road pushes back against the tires.

• A ball is thrown and it falls to the ground.

• A person jumps and the ground pushes them up.

What is the difference between speed and velocity?

• Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

• Speed and velocity are the same; both refer to how fast an object is moving.

• Velocity is a scalar quantity that refers to how fast an object is moving, while speed is a vector quantity that includes both speed and direction.

• Speed is a measure of distance traveled over time, while velocity is a measure of time taken to travel a distance.