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CH3 Newtons 2nd Law
Of Motion Force And Acceleration
| Question | Answer |
|---|---|
| What Describes Acceleration? | A change in both speed and direction |
| Which Of The Following Controls On An Automobile Affects Acceleration? A)gas pedal B)brakes C)steering wheel D) all the above | D)all the above |
| When a car changes direction its speed doesn't change... is it accelerating? | yes it sure is accelerating because its direction changed |
| What if the car slows down but doesn't change direction? Is it accelerating then? | yes because the velocity of the car is changing |
| Acceleration | rate at which velocity changes with time( CHANGE IN SPEED & DIRECTION)This is a positive |
| Deceleration | when something slows down this is a negative |
| what does an object do when a net force acts on it? | it ACCELERATES BITCHHHHH tehe (= |
| what does greek letter (A) symbolize? | change in & difference in |
| what is the acceleration due to its gravity for freely falling bodies? | 9.8m/s2 |
| what is acceleration caused by? | applying net force |
| T/F the symbol ~ stand for directly proportional to | True nigggaaa |
| what other factor affects an objects acceleration? | Mass |
| if acceleration is in a certain direction what is the direction of net force? | its the same direction |
| what does it mean to say that acceleration is proportional to net force? | if one increases the other increases |
| relationship between mass and weight? | they're directly proportional to each other |
| compare mass and weight | both depends on gravity |
| T/F? An object that has a given mass weighs more on earth than it weighs on the moon? | False |
| how can you get a sense of an objects mass rather than its weight | its a property of the object itself and stays the same regardless of its location |
| why does an empty tin can accelerate more than a tin can full of rocks with the same (kicking) force? | it accelerates more because it takes less force |
| what is the difference between mass and volume? | volume is measured in liters,ccs,cm3 and mass is measure in kilograms |
| write an equation showing the relationship between mass and acceleration | A~|/mass |
| what does inversely proportional mean in words | as one gets bigger the other gets small |
| shorthand notation for Newton's 2nd law | A=f/m |
| Newtons 2nd law as an equation | m/s2= n/kg |
| T/F the acceleration of an object equals the net force on the object divided by its mass | True |
| Occurs when one object tends to rub or does rub against something else. | friction |
| T/F friction occurs for solids and liquids but not gases | False |
| One of the important features of friction: | it acts in a direction to oppose motion |
| what can you say about the net force on an object when you push it across the table just hard enough to match friction? | it is zero and slides at a constant velocity |
| why did Galileo use inclined planes in his experiments on forces of gravity? | because they slow down at acceleration |
| what did Galileo's experiments tell him about the influence of mass on the acceleration due to gravity? | it didn't depend on mass |
| How did Newtons 2nd law explain why objects with different weights fall with the same acceleration | force to mass ratio have the same amount of acceleration. |
| frictional force of air drag depends on which of the following items? A)speed B)surface area C) both of the above | C) both of the above |
| in free fall the downward net force is weight. But what is the net force when air is present? | weight minus air drag |
| what happens when the air drag becomes equal to the weight (weight-air drag=zero)? | terminal velocity equilibrium / Result equation is zero |
Created by:
Chinadollie
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