Forces Study Guide

A group of students is playing tug-of-war. The students on both sides of the rope are pulling with equal force so that the rope is not moving. This is an example of 

• unbalanced forces

• balanced forces

• acceleration

• displacement

A firefighter feels the hose pushing backwards onto him as he uses it to put out a fire. What is the most likely cause of this?

• The hose material is very elastic

• since the hose is at rest, it tends to stay at rest

• the force exerted on the water equals the mass of the water times its acceleration

• the escaping water exerts an equal and opposite force on the hose

Tags

NGSS.MS-PS2-1

If the same force is applied to each of the balls pictured below, which one will have the LEAST acceleration?

• A

• B

• C

• D

Tags

NGSS.MS-PS2-2

Which of the following is measured in Newtons?

• weight

• momentum

• mass

• acceleration

Tags

NGSS.MS-PS2-4

The upward force on an object falling through the air is _______.

• air resistance

• momentum

• inertia

• gravity

The relationship among mass, force, and acceleration is explained by __________.

• Newton's 1st law

• Newton's 2nd law

• Newton's 3rd law

• Law of Conservation of Momentum

Tags

NGSS.MS-PS2-2

According to Newton's Laws, for any object, the greater the force that's applied to it, the greater its _________ will be. 

• acceleration

• inertia

• gravity

• size

Tags

NGSS.MS-PS2-2

The size of the gravitational force between two objects depends on their __________.

• frictional force

• inertia

• masses and the distance between them

• speed and direction

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

An astronaut is planning a trip to a newly-discovered planet. According to the Law of Universal Gravitation, the astronaut's weight on the new planet will be greater than his weight on Earth if: 

• the new planet has less gravity than Earth.

• the new planet has the same gravity as Earth.

• the new planet has more gravity than Earth.

• the gravity of the planet doesn't matter. Weight is the same everywhere in the universe.

Tags

NGSS.MS-PS2-4

"For every action there is an equal and opposite reaction" describes which law?

• Law of Conservation of Momentum

• 1st law

• 2nd law

• 3rd law

Tags

NGSS.MS-PS2-1