Physics 1

Question 1

Newton’s first law states:

Answer 1

Law of inertia. An object in motion tends to remain in motion. An object at rest tends to remain at rest unless acted upon by an outside force

Question 2

push or pull

Answer 2

Force

Question 3

gravitational, electrical, magnetic, muscular are all different types of _____.

Answer 3

Force

Question 4

Units of force (2):

Answer 4

Pounds and Newtons

Question 5

When more than a single force acts on an object

Answer 5

Net force

Question 6

a quantity such as force that has both magnitude and direction

Answer 6

Vector quantity

Question 7

When the net force on something is zero.

∑F = 0

Answer 7

Mechanical equilibrium

vector sum of all forces = 0

Question 8

The upward force opposite to the force of gravity

Answer 8

Support Force (normal force)

Question 9

an object moving at a constant speed in a straight-line path is also in equilibrium.

Answer 9

Dynamic equilibrium

Question 10

state of no change (requires 2 or more forces)

Answer 10

equilibrium

Question 11

simplest form of motion. motion along a straight-line path.

Answer 11

Linear motion

Question 12

speed at any instant in time

Answer 12

instantaneous speed

Question 13

total distance covered/time interval =

Answer 13

Average speed

Question 14

distance covered per unit of time

Answer 14

speed

Question 15

distance/time =

Answer 15

speed

Question 16

description of how fast AND in what direction an object is moving

Answer 16

Velocity

Question 17

motion in a straight line at a constant speed

Answer 17

constant velocity

Question 18

either the speed or the direction (or both) change

Answer 18

changing velocity

Question 19

how quickly velocity changes

Answer 19

Acceleration

Question 20

Acceleration = change in velocity/time interval

Answer 20

What acceleration IS

Question 21

When direction doesn’t change, _______ may be expressed as the rate at which speed changes

Answer 21

acceleration

Question 22

When a falling object is free of all restraints and falls under the influence of gravity alone

Answer 22

Free fall

Question 23

V = acceleration x time

Answer 23

instantaneous velocity

how fast

Question 24

distance traveled = 1/2 (acceleration x time x time)

Answer 24

Distance traveled by a uniformly acceleration object starting from rest

(how far)

Question 25

Acceleration ~ net force/mass

Answer 25

Acceleration is directly proportional to net force and inversely proportional to mass

Question 26

a force produced when surfaces are sliding over one another

Answer 26

Friction

Question 27

_____ does not depend on area of contact.

Answer 27

Friction

Question 28

Friction also occurs in _____ .

Answer 28

fluids

Question 29

quantity of matter in an object

Answer 29

mass

Question 30

force upon an object due to gravity

Answer 30

weight

Question 31

when acceleration terminates.

Answer 31

Terminal speed

Question 32

a = (mg – R)/m

Answer 32

acceleration is equal to (weight - air resistance)/mass.

Question 33

To every action there is always an opposed equal reaction.

Answer 33

Newton’s 3rd Law

Question 34

the upward reaction force caused when air particles are forced down (action) and the air forces the object up (reaction)

Answer 34

Lift

Question 35

a quantity that can be described by magnitude only

Answer 35

Scalar quantity

Question 36

an “arrow” that represents a vector quantity

Answer 36

Vector

Question 37

The sum of two or more vectors

Answer 37

resultant

Question 38

Construct a parallelogram wherein the two vectors are adjacent sides. The diagonal will show the resultant

Answer 38

Parallelogram Rule