Friction

Question 1

What is the force of friction?

Answer 1

Is the force applied to an object when it moves against the surface of another object.

Question 2

Why is friction important when you walk?

Answer 2

Because if u didn’t have it you would slip everywhere.

Question 3

How can u reduce friction?

Answer 3

By making a surface smoother. You can also put oil or grease on on the surface.

Question 4

What is streamlining?

Answer 4

Is the reducing of fluid friction.

Question 5

What is fluid friction?

Answer 5

When an object moves through fluid past an object. This is also known as drag.

Question 6

how is friction bad?

Answer 6

When there is too much

Question 7

What is an independent variable?

Answer 7

Is something that changes in an experiment

Question 8

What is a dependent variable?

Answer 8

The dependent variable depends on the indecent variable. It’s also what you measure in an experiment. It also the thing that changes within an experiment.

Question 9

What is a controlled variable?

Answer 9

Controlled variable are the things you can control in an experiment.

Question 10

What is a fair test?

Answer 10

A fair test is to make sure you only change one factor at a time in the same conditions

Question 11

What is Mass and what is its unit of measure?

Answer 11

Mass is the amount of matter in an object and is measured in kilograms.

Question 12

What is weight and what is its unit of measure?

Answer 12

Weight is the size of gravitional force acting on an object and is measured in Newtons.

Question 13

What is Mass and what is its unit of measure?

Answer 13

Mass is the amount of matter in an object and is measured in kilograms.

Question 14

What is weight and what is its unit of measure?

Answer 14

Weight is the size of gravitional force acting on an object and is measured in Newtons.

Question 15

What causes a boat to float ?

Answer 15

Buoyancy

Question 16

What is density and how do you calculate it ?

Answer 16

Is a measure of how tight matter is packed into any material. You calculate it by mass divided by volume and is in g/cm3

Question 17

What is buoyancy

Answer 17

The force of buoyancy pushes upwards to keep the cruise ship afloat. Buoyancy is the upward push of an object that is floating or submerged in fluid.

Question 18

What type of machine is a seesaw.

Answer 18

It’s a first class lever and simple machine

Question 19

What are the three different types of levers?

Answer 19

First class lever - seesaw, scissors
Second class lever - wheelbarrow, stapler 
Third class lever - fishing rod, tongs

Question 20

What is a permanent magnet?

Answer 20

Am permanent magnet never loses it magnetism.

Question 21

What is a temporary magnet?

Answer 21

A temporary magnet eventually loses its magnetism

Question 22

What is magnetic field?

Answer 22

Is where the magnetic force acts

Question 23

What is an electromagnet?

Answer 23

Is used to store and read magnetic patterns. It is a coil of wire wrapped around an iron core.

Question 24

Why don’t we fall through the floor?

Answer 24

Because the force exerting from the floor and gravity pulling us in is even.

Question 25

What are forces?

Answer 25

A force is a push or pull on an object. It also changes the speed, shape and direction of objects.

Question 26

What are contact forces?

Answer 26

Friction. Thrust. Compression. Air resistance

Question 27

How do we represent forces

Answer 27

In Arrows.

Question 28

What hold water on a coin

Answer 28

Surface tension

Question 29

What is a lever

Answer 29

A simple machine

Question 30

What do all levers have in common.

Answer 30

They all have a lever effort and load.

Question 31

What are the magnetic pole s

Answer 31

North and south attract each other. North and north repel each other. South and south repel each other.

Question 32

What elements are in magnets

Answer 32

Iron and