Forces, Terminal Velocity, Mass, Weight for Retake Test #5

Newton's 1st Law (An object at rest will remain at rest, and an object in motion ... etc.) is also called the law of ______.

• inertia

• acceleration

• force

• motion

• mass

According to Newton's 1st Law of motion, the STATE OF MOTION of an object will NOT CHANGE as long as the net force on the object is

• unbalanced

• zero

• higher than in the beginning

• lower than in the beginning

______ is defined as "The tendency of an object to resist a change in its motion."

• acceleration

• velocity

• weight

• inertia

According to Newton's 2nd Law of motion, mass and acceleration are _______ related ... as mass increases for a given force, acceleration ______ in response.

• directly, increases

• inversely, decreases

• inversely, increases

• directly, decreases

• not, remains constant

According to Newton's 2nd Law of Motion, an increase in force will cause an object to

• increase its mass

• increase its acceleration

• decrease its acceleration

• decrease its mass

If you apply a force to an object, and then increase the object's mass and apply the same force again, the object's acceleration will

• increase

• decrease

• stay the same

• automatically become zero

Calculate the net force applied to a 60-kg dirt bike if it accelerates at 3.0 m/s².

• 20 N

• 180 N

• 0.05 N

• 100 lbs

• 20 lbs

A boy pushes a 30-kg cart full of groceries forward with a net force of 20.0 N. What is the acceleration of the cart?

• 1.5 m/s/s

• 0.67 m/s/s

• 600 m/s/s

• 50 m/s/s

• 10 m/s/s

A net force of 25 N accelerates a child in a wagon at 0.5 m/s². What is the mass of the child and the wagon?

• 12.5 kg

• 0.02 kg

• 50 kg

• 1.25 kg

• 50 lbs.

A lunar vehicle that has a mass of 300 kg on Earth has a mass that is __________ while on the moon.

• 300 kg

• greater than 300 kg

• less than 300 kg

• 300 N