8.6c

An ice skater at rest pushes against a sled at rest, causing both the skater and sled to move away from each other with different accelerations. This is an example best described by

• Newton’s first law of motion for objects at rest.
• Newton’s first law of motion for objects in motion.
• Newton’s second law of motion.
• Newton’s third law of motion.

Tags

NGSS.HS-PS2-2

How does Newton’s third law explain how a rocket takes off?

• The rocket’s acceleration is positive, while the gasses acceleration is negative but the direction is the same. 
• The rocket is at rest until ignition.
• The hot gasses move in one direction, while the rocket moves in the opposite direction but with equal force.

For every action there is an equal and opposite reaction; equal in force and opposite in direction.

• Newton’s first law of motion
• Newton’s second law of motion
• Newton’s third law of motion

If a force of 26 N is exerted on two balls, one with a mass of 5 kg and the other with a mass of 8 kg, which ball will have the greater acceleration?  (F=ma)

• The one with a mass of 8 kg will have the greatest acceleration.
• The one with a mass of 5 kg will have the greatest acceleration.
• They will both accelerate at the same rate.

Tags

NGSS.HS-PS2-1

A greater applied force is required to move an object with a greater mass than one with a smaller mass.

• True
• False

Tags

NGSS.HS-PS2-1

If you are driving forward and suddenly break, what would happen to your body and which law does that demonstrate?

• go back,  Law of inertia
• move forward,  Law of inertia

Tags

NGSS.HS-PS2-1

An object in motion will stay in motion and an object at rest will stay at rest unless acted upon by an outside force.  Which law does this describe?

•  Law of inertia
•  Law of acceleration
• Law of action - reaction

In a football game, two players tackle each other so hard that they both fly in opposite directions after they hit each other.  What law of motion is this an example of?

•  Law of inertia
• Law of action - reaction
• Law of acceleration

A student leaves a pencil on a desk and it stays there until I pick it up. 

•  Law of inertia
• Law of acceleration
• Law of action - reaction

Tags

NGSS.MS-PS2-1

Which law explains when a magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them.

• Law of inertia
• Law of acceleration
• Law of action - reaction