Question

please answer the all questions please please please please please please please please please please please ​

Answer 1

Answer:

answer of question no 2 is

1- c

2- b

3- a

pls mark as brainlist

Answer 2

Answer:

Que 1 - ans: fill ups

• 1 - gravity .
• 2 - thoracic cavity.
• 3 - friction.

Que 2 - ans: match the following :

• walking - normal force.
• upward push on a book by a table - Muscular force.
• finger prints provides us - force of friction.

Que 3 - and: 5 - define contact force -

• Contact force is the force that act between two objects that are physically touching each other.

6 - what is ment by muscular force?

• Muscular force is the force applied using parts of body like arms or legs .it results due to the action of the muscles , and is a contact force. since there is a contact between the surface.

7 - ans - In this example, the force acting on a book, is a gravitational force & normal force. are

equal & opposite giving a zero net force.

here, the velocity is Zero & remains unchanged.

Que 4 - ans

• 8 - ans: the force of resistance of the motion seems to be more on the rough surface than on the smooth surface.

• 9 - ans: there are two ways to reduce the air resistance are state : reducing the area in contact with air (by the cyclists ducking down or cycling behind some one else) & by being more streamlined (.wearing smoother surface or more streamlined helmet).
• 10 - ans : The balls motion will be faster along a flat surface at the bottom of the hill then it did along the flat surface at the top.

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