Flashcards in Motion & Newton's Laws Deck (20):

1

## If two objects have different masses, which object is easier to accelerate? Which law supports your answer?

### The object with the least mass requires less force– 2nd law

2

## The tendency of an object to resist change in its motion is known as __________.

###
inertia (1st law).

3

## Speed equals distance divided by __________.

### time

4

##
On a graph showing distance versus time, a horizontal line represents an object that is __________.

###
not moving at all (at rest, stopped).

5

## Give an example of negative acceleration.

### A car approaching a red light; a ball rolling to a stop.

6

## If a bicyclist travels 30 kilometers in two hours, her average speed is __________.

### S = D/T 15 km/h.

7

## In speed-versus-time graph, a diagonal straight line shows that acceleration is __________.

### constantly speeding up

8

##
A person traveling in a car that stops suddenly keeps moving forward due to__________.

Which law is this?

###
inertia

Newton's 1st Law

9

## If the action force of a bat striking a ball accelerates the ball in one direction, the reaction force accelerates the bat in the __________ direction.

### opposite (3rd law)

10

## A roller coaster is moving at 10 m/s at the top of a hill and 22 m/s at the bottom of the hill two seconds later. What is the average acceleration? A=F(s)-I(s)/T _______

### (22-10)/2= 6m/s^2

11

## The total distance traveled divided by the total time taken to travel the distance is __________.

### average speed

12

## Newton's first law of motion states that an object remains at rest unless a(n) __________ force acts on it.

### unbalanced

13

## The statement "for every action, there is an equal but opposite reaction" is a statement of Newton’s ___ law.

### 3rd

14

## When a swimmer pushes the water back, the water pushes the swimmer forward. What is the reaction force in this situation?

### The water pushing the swimmer forward. (opposite)

15

## If you push a skateboard that has a mass of 60kg with a force of 6N, what force will the skateboard push back on you according to Newton’s third law of motion?

### 6N (It’s equal because of 3rd law.)

16

## Forces that are equal in size but opposite in direction and cause no change in motion are ________ forces.

### balanced

17

## Define displacement. Displacement is the distance and direction an object is from starting point to stopping point.

### Displacement is the distance and direction an object is from starting point to stopping point.

18

## What is the key factor in determining if an object is in motion?

### Change in position relative to a reference point

19

## What is the motion of an object with zero acceleration?

### At rest or at a constant speed (no change in motion)

20