Active Review Unit D

Front

What is the property of an object that causes it to maintain its current state of rest or uniform motion?

Back

Inertia is the property of an object that causes it to maintain its current state of rest or uniform motion unless acted upon by an external force.

Front

Which law explains the phenomenon where when one object exerts a force on another, the second object exerts an equal and opposite force back?

Back

Newton's Third Law states that for every action, there is an equal and opposite reaction.

Front

What is the force that acts downward on an object due to gravity?

Back

Weight force is the force acting downward on an object due to gravity.

Front

How do you calculate the net force acting on an object?

Back

Net force is the vector sum of all forces acting on an object. For example, if there are 30 N left and 25 N right, the net force is 5 N left.

Front

Which law of motion states that an object in motion stays in motion unless acted upon by an external force?

Back

Newton's First Law states that an object at rest stays at rest and an object in motion stays in motion unless acted upon by an external force.

Front

What is the term for the force exerted by a surface to support the weight of an object resting on it?

Back

Normal force is the force exerted by a surface to support the weight of an object resting on it.

Front

What is the relationship between mass and acceleration in Newton's Second Law?

Back

Newton's Second Law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F=ma).

Front

What is friction and how does it affect motion?

Back

Friction is a force that opposes the relative motion of two surfaces in contact. It slows down or stops the motion of objects.

Front

What is the difference between static and kinetic friction?

Back

Static friction acts on objects that are not moving, while kinetic friction acts on objects that are sliding over each other.

Front

What is the formula for calculating weight?

Back

Weight (W) is calculated using the formula W = mg, where m is mass and g is the acceleration due to gravity.