Science: Physics Help?

Question

I need help on the following questions and the questions I have answered to know if they are right:
1)Which of Newton's laws explains why a person must hold on to some part of the interior of a bus, as it accelerates away from a stop?
Answer: Inertia ?

2) Inertia is said to be a property of all matter. Describe what is meant by the property of inertia?

3) When you lean on a tabletop, you are applying a force to it . What does Newton's third law suggest about the response of the tabletop?

4) When we push on a mass , what determines how fast it moves off, and whether it moves off?

5) Complete this sentence:
All bodies maintain there state of motion unless.............

Thank You.

Answer 1

neutons 1st law
it resides in all properties of matter
it pushes back with equal force on you
your mass + friction+ its mass + force
acted upon by an outside force

Answer 2

1) Newtons 3rd Law
Every action has an equal and opposite reaction....
When the bus accelerates in one direction - you are pushed in the opposing direction.

2) Inertia is the property of an object to remain constant in velocity unless acted upon by an outside force. Inertia is dependent upon the mass and shape of the object.

3) Newton's 3rd Law (as above)....
If the table top did not supply an equal force to what you have put onto it (whilst leaning) it would either -:
i) Push you harder and make you go up in to the air (fairly impossible.
ii) It would collapse as it couldn't provide the same force as you are putting on it (more likely)
iii) It provides an exact force to the one you have put onto it and thus the table supports your weight (very high probability of this one.)

4) The Force that you push the mass with determines it's acceleration.....
Newton's 2nd Law-: Force = Mass x Acceleration (F = ma)
The Force must be great enough to move the mass, otherwise it would just stay still - normally this is to overcome the frictional forces between the mass and the floor.

5) All bodies maintain there state of motion unless....
they are acted upon by another force. (Newton's 1st Law)