Newton's 1st Law of Motion

Newton's First Law of Motion states that an object's velocity will be constant if...

• ... there is no net force acting on it.

• ... a net force is applied in the direction of motion.

• ... the object is near the surface of the Earth.

• ... the object falls.

What is the net force on an object?

• the sum of all forces acting on an object

• the force on an object caused by a string or cable

• the tendency of an object to resist changes in its motion

• equilibrium

What does it means for an object to be in equilibrium?

• the net force on the object is zero

• the net force on the object is not zero

• a normal force and a gravitational force act on the object

• a tension force and a gravitational force act on the object

If a moving object is in equilibrium, we say that the object is...

• in translational equilibrium.

• accelerating.

• in free fall.

• experiencing unbalanced forces.

Which object has the greatest inertia?

• a small potato

• a normal-sized pumpkin

• an adult human

• a truck

Which of the following is another way to state Newton's First Law of Motion?

• If an object's acceleration is zero, then the forces on the object are balanced.

• If an object's velocity is increasing, then the object is in equilibrium.

• If an object's acceleration is upward, then there is no net force on the object.

• If an object's velocity is constant, then the net force on the object is upward.