Before moving on, take a moment to review the three laws.
| Newton's First Law | Newton's Second Law | Newton's Third Law |
|---|---|---|
| An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force. | The acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to the object's mass. | When an object exerts a force on a second object, the second object exerts an equal and opposite force on the first object. |
For each description or definition below, select Newton's law that it represents best.
A car stops suddenly and the passengers experience whiplash.
An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force.
An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force.
An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force.
The law of action-reaction pairs.
When an object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.
When an object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.
When an object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.
A swimmer pushes water backward in order to move forward in the water.
When an object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.
When an object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.
When an object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.
The law of inertia.
An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force.
An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force.
An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force.
A gun that is fired recoils.
An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force.
An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force.
An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force.
The law that relates force to acceleration and mass.
The acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to the object's mass.
The acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to the object's mass.
The acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to the object's mass.
A rope climber must pull downward on the rope to move up.
When an object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.
When an object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.
When an object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.
After being hit, a hockey puck continues in motion on the ice.
An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force.
An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force.
An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force.
A placekicker kicks the football and afterwards his foot hurts.
When an object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.
When an object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.
When an object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.
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