science study

Question 1

what is force?

Answer 1

force is something that pushes and pulls an object in a pacific way.

Question 2

what is an unbalanced force?

Answer 2

an unbalanced force is the force applied in one direction is greater than the force applied in the opposite direction.

Question 3

what is a balanced force?

Answer 3

a balanced force is something that is opposite in direction and equal in size.

Question 4

what is air resistance?

Answer 4

air resistance is the force opposing force gravity.

Question 5

what is friction?

Answer 5

a contact force: occurs when two surfaces come into contact with eachother.

Question 6

what is gravity?

Answer 6

gravity is something that pulls an object to a surface .

Question 7

what is magnetism?

Answer 7

the force exerted by magnets when they attract or repel each other

Question 8

what is mass?

Answer 8

how much matter (solid, liquid, and gas) is inside you.

Question 9

what is weight?

Answer 9

measure of the pull of gravity on your mass.

Question 10

what is newtons?

Answer 10

the SI unit of force. It is equal to the force that would give a mass of one kilogram an acceleration of one meter per second per second and is equivalent to 100,000 dynes.

Question 11

what is newtons 1st law?

Answer 11

newtons 1st law is that a object in motion will remain in motion and an object at rest will remain at rest unless acted Apon by a unbalanced force.

Question 12

what is terminal velocity?

Answer 12

the limiting uniform velocity attained by falling body when the resistance of the air has become equal to the force of gravity.

Question 13

what is static friction?

Answer 13

friction that stops an object from moving.

Question 14

kinetic friction

Answer 14

the force that opposes an object from moving’

Question 15

useful friction

Answer 15

traction needed to walk without slipping,

Question 16

unwanted friction

Answer 16

Friction always opposes motion and is often an unwanted force.

Question 17

buoyancy

Answer 17

the ability or tendency of something to float in water or other fluid.

Question 18

sinking

Answer 18

If the weight force down is larger than the upward push of the water on the object then the object will sink.

Question 19

floating

Answer 19

when the weight force on the object is balanced by the upward push of the water on the object

Question 20

neutral buoyancy

Answer 20

a condition in which a physical body’s average density is equal to the density of the fluid in which it is immersed.

Question 21

density and its formula

Answer 21

how much space an object or substance takes up (its volume) in relation to the amount of matter in that object or substance (its mass).

Question 22

fulcrum

Answer 22

a thing that plays a central or essential role in an activity, event, or situation.

Question 23

load

Answer 23

a heavy or bulky thing that is being carried or is about to be carried

Question 24

effort

Answer 24

a vigorous or determined attempt.

Question 25

first class levers

Answer 25

scissors

Question 26

second class levers

Answer 26

wheelbarrow

Question 27

third class levers

Answer 27

tweezers