Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Ch. 11 - Science
Study Guide - Force & Newton's Laws
| Question | Answer |
|---|---|
| Forces that are equal in size but opposite in direction are called _____ forces. | balanced |
| Does Earth exert a balanced or unbalanced force on a ball thrown into the air? | unbalanced |
| What 3 things can happen if a net force acts on an object? | balanced cancels out unbalanced is stronger than |
| What does friction do to two objects or surfaces that are in contact with one another? | slow down |
| Cars, airplane wings, and bike helmets are built in a streamlined shape to reduce ________ | air resistence |
| If a car goes around a curve at a constant speed, is there a net force acting on it? | No |
| What "response" does the Earth have if you push downward on it to pole vault? | gravity |
| Do forces act alone? | No |
| Newton's first law of motion states that an object stays in constant motion unless a force acts on it. Is that a BALANCED force or an UNBALANCED force? | UNBALANCED |
| What do we call forces that are equal in size but opposite in direction? | balanced forces |
| What would happen to ball thrown straight horizontally if gravity did not pull it down (look in the section on satellites)? | it would start to go in a curved path as its speed increases |
| Air resistance __________ as you move faster. (increases or decreases?) | increases |
| Which force do you have to overcome to start an object moving? | static friction |
| Whenever something is in motion, there is always _______ to oppose the motion. | reaction |
| Which law of motion states the relationship among force, mass, and acceleration? | Newton's Second Law |
| Why does a feather fall through the air more slowly than a brick? (no it's mass--why else?) | the feather has more air resistance than the brick |
| __________ is the tendency of an object to resist any change in its motion. | inertia |
| A(n) __________ is a push or pull that one object exerts on another. | force |
| Friction always acts in a direction either EQUAL or OPPOSITE to the direction of motion. | OPPOSITE |
| Which law is a rocket launching an example of? | Newton's Third law |
| List the TWO parts of Newton's first law of motion. | An object at rest will stay at rest unless acted upon by another force. An object in motion will stay in motion unless acted upon by an outside force. |
| Name Newton's third law of motion | For every action there is an equal and opposite reaction |
| Why is it easier to move a heavy box on a wheeled cart than it is to slide it on the floor? | You only have to move one part instead of a whole part |
| What would happen to an object's acceleration if its mass decreased (got smaller or lighter) but the force remained the same? | speed up |
| __________ friction keeps an object at rest. | static |
| What two things can a force do? | Push or Pull |
| The unbalanced force that stops almost everything is __________. | friction |
| A net force acting on an object changes the object's __________ | direction |
| Which law of motion describes the connection between an object supplying force and the object receiving the force? | Newton's Second Law |
| If an object is at rest, all forces acting on that object must be (unbalanced, balanced, normal). | balanced |
| Newton's second law of motion states that acceleration depends on the force applied to an object and the object's _________. | mass |
| Review your F=ma worksheet on calculating force, mass, or acceleration. There will be 4 math problems on the test where you will need to do this. | This was at the end of your study guide. |
Created by:
clj.ss.7
Popular Physical Science sets