Post FD Flashcard Review

Front

What is the net force acting on an object when the forces are balanced?

Back

The net force is zero, meaning the object is in equilibrium.

Front

Define equilibrium in the context of forces acting on an object.

Back

Equilibrium occurs when the sum of all forces acting on an object is zero, resulting in no acceleration.

Front

If two people lift a box with equal force, what can be said about the box's motion if the forces exceed the weight of the box?

Back

The box will accelerate upwards.

Front

What happens to an object in free fall when air resistance becomes significant?

Back

It reaches a constant speed, known as terminal velocity, and is in equilibrium.

Front

What is the combined force exerted by two people lifting a box if each exerts 150 N?

Back

The combined force is 300 N.

Front

True or False: An astronaut floating in space is in equilibrium.

Back

True, because there are no unbalanced forces acting on them.

Front

What does it mean if an object is not in equilibrium?

Back

It means that there is a net force acting on the object, causing it to accelerate.

Front

If a feather falls at a constant speed, what can be inferred about the forces acting on it?

Back

The upward air resistance force equals the downward gravitational force, resulting in equilibrium.

Front

What is the weight of an object?

Back

Weight is the force exerted by gravity on an object, calculated as mass times the acceleration due to gravity (W = mg).

Front

How do you determine if an object is accelerating?

Back

An object is accelerating if the net force acting on it is not zero.