Unit 2 and 3 Test

Question 1

formula for speed

Answer 1

s=d/t

Question 2

formula for velocity

Answer 2

v=d/t direction

Question 3

formula for momentum

Answer 3

p=m x v

Question 4

formula acceleration

Answer 4

a=vf-vi/ t

Question 5

formula or force

Answer 5

F=m x a

Question 6

formula of weight

Answer 6

W=m x g

Question 7

Formula to find the change in velocity of a falling object

Answer 7

^v=g x t

Question 8

formula to find distance an object would fall due to gravity

Answer 8

d=1/2g x t^2

Question 9

Occurs when an object changes its position

Answer 9

Motion

Question 10

The speed of an object over time with a direction

Answer 10

Velocity

Question 11

Forces that are not equal in all directions. Has a net force greater than 0.

Answer 11

Unbalanced Forces

Question 12

A force that apposes the motion of objects moving through air.

Answer 12

Air resistance

Question 13

The measurement of gravitational force exerted on an objects mass.

Answer 13

Weight

Question 14

A property of a moving object that depends on the objects mass and velocity.

Answer 14

Momentum

Question 14

A property of a moving object that depends on the objects mass and velocity.

Answer 14

Momentum

Question 15

The distance and direction of an objects final position from its initial position

Answer 15

Displacement

Question 16

Change in velocity over time

Answer 16

Acceleration

Question 17

The sum of all forces acting on an object

Answer 17

Net force

Question 18

The highest velocity a falling object will reach as the object falls due to gravity.

Answer 18

Terminal Velocity

Question 19

The amount of matter in an object

Answer 19

Mass

Question 20

g

Answer 20

The gravitational force exerted on an object’s mass.

Question 21

Distance an object travels over time.

Answer 21

speed

Question 22

Any push or pull on an object.

Answer 22

force

Question 23

friction

Answer 23

The force that opposes the motion between 2 surfaces in contact.

Question 24

Inertia

Answer 24

The tendency of an object to resist any change in the objects motion.

Question 25

In object moving through the air.

Answer 25

Projectile

Question 26

When an object falls due to gravity free from air resistance

Answer 26

free fall

Question 27

Total distance an object moves over the toal period of time.

Answer 27

Average speed

Question 28

balanced force

Answer 28

Forces acting on an object that are equal in size but opposite in direction

Question 29

micro-welds

Answer 29

When tiny ridges or bumps on an objects surface come into contact

Question 30

gravity

Answer 30

AN attractive force between two objects that depends on the masses of the objects and the distance between the objects

Question 31

centripetal force

Answer 31

A force that causes an object to move in a curved/circular path.

Question 32

Physical Science

Answer 32

The study of matter and energy.

Question 33

Newtons first law

Answer 33

An object at rest tends to stay at rest, an object in motion tends to stay in motion, unless acted on by an unbalanced force.

Question 34

Newtons first law

Answer 34

An object moves at a constant velocity unless an unbalanced force acts on the object

Question 35

The law of inertia is another meaning for what Newtons law?

Answer 35

First Law of motion

Question 36

Newtons second law of motion

Answer 36

An objects acceleration is in the same direction as the net force on the object and is equal to the net force exerted on the object divided by the objects mass.

Question 37

Newtons second law of motion

Answer 37

The motion of an object changes only if an unbalanced force acts on the object.

Question 38

newtons second law of motion formula

Answer 38

a=F/m

Question 39

newtons third law of motion

Answer 39

For every action force there is an equal but opposite reaction force

Question 40

newtons second law of motion

Answer 40

When an object exerts a force on a second object, the second object exerts a force on the first object equal in strength and opposite in direction.

Question 41

3 factors to determine whether or not an object will reach terminal velocity

Answer 41

-the height with which object is dropped -mass of the object -surface area of the object

Question 42

4 factors that affect the amount of friction between the surfaces of objects

Answer 42

-type of material object is composed -roughness of the surfaces in contact -the amount of force being applied pushing the two surfaces together -Amount of surface area in contact

Question 43

2 factors that affect the amount of friction between the surfaces of an object

Answer 43

-The amount of surface area size and shape -velocity of the object

Question 44

2 factors to determine how much gravitational force will be exerted between two objects

Answer 44

-Distance between the objects. -Mass of the objects

Question 45

Law of Conservation of Momentum

Answer 45

When a moving object collides with another object the momentum of the original object will give some or all of its momentum to the second object

Question 46

Static friction

Answer 46

Prevents two surfaces from sliding past each other due to microwelds have formed between the floor and the object

Question 47

Sliding friction

Answer 47

opposes the motion of two surfaces allowing the force to break through microwelds

Question 48

rolling friction

Answer 48

A frictional force when an object rolls on another