PHYSICS: Motion & Force

A book is in a state of rest on a table.What condition would allow the book to continue in its state of rest?

• an absence of external forces
• a force lifting the table
• an absence of gravity
• a force pulling the table

A cat jumps from the ground onto a table. According to Newton's third law of motion, which of the following is true?

• The cat's muscles are stronger than the force of gravity.
• When the cat pushed down on the ground to jump, the ground applied aforce to the cat.
• Once the cat was in motion, an external force was required to bring the cat to rest.
• The net force on the cat is dependent upon the cat's mass and acceleration.

Units of mass are represented in:

• m/s²
• yds
• kg
• ft

What is the unit of force?

• unbalanced forces
• balanced forces
• grams
• Newtons

A push or pull is a:

• unbalanced force
• force
• balanced force
• Newtons

Tags

NGSS.3-PS2-1

What is an unbalanced force?

• An equal force on an object.
• An unequal force on an object.
• A force that does not move an object.
• Inertia.

Tags

NGSS.MS-PS2-2

What are two things that acceleration depends on?

• gravity and speed
• speed and mass
• force and motion
• mass and force

A cannonball is shot from a cannon. What will eventually happen to the cannonball's motion?

• External forces will cause the cannonball to come to rest.
• External forces will cause the cannonball to continue in its state of motion.
• External forces will cause the cannonball to orbit Earth.
• External forces will cause the cannonball to maintain constant velocity.

Which of the following is the unit of acceleration?

• unbalanced forces
• kg
• m/s²
• lbs

What is the term to describe "objects that want to stay at rest" and "objects that want to stay in motion"?

• Mass
• Inertia
• Energy
• Friction