Read the paragraph and answer the questions:

The sliding frictional force between a 4kg box and the floor is 15N. It is pushed across the floor with a constant force such that it accelerates at 0.8m/s^2.

Ques 1:What is the force applied to the box?

Ques 2:If this same force calculated is applied to the box which is now placed on a frictionless surface,what is the new acceleration produced?

I want  complete notes on the chapter friction 

In my book subtopics are:

Friction 

Types of friction 

Factors affecting friction 

Methods of reducing friction 

Methods of increasing friction 

Advantages and disadvantages of friction 

Some real life based situation where friction is applied.

How to make a monomer into polymer if it is an addition polymer example

This planet, _______ is yellowish in colour and has many rings and satellites.

A. Uranus

B. Jupiter

C. Neptune

D. Saturn

Pasteurized milk does not need to be boiled. Why?

Write the $pH$ value of the

1. Saliva (before meal)

2. Saliva (after meal)

3. Lemon juice

4. Colourless aerated drink

5. Carrot juice

6. Coffee

7. Tomato juice

8. Tap water