Quick Astronomy Questions, HW Help!?

Question

An object with mass has a natural tendency to stay still unless a force is acting upon it. What is this natural tendency of an object called?

a. Weight
b. Friction
c. Force
d. Inertia


With all other factors equal, if you double the unbalanced force on an object of a given mass the acceleration will be
a. increased by one-half.
b. increased fourfold.
c. doubled.
d. increased by one-forth.

Answer 1

d.
The principle of inertia is one of the fundamental laws of classical physics which are used to describe the motion of matter and how it is affected by applied forces. 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. The concept of inertia is today most commonly defined using Sir Isaac Newton's First Law of Motion, which states:

Every body perseveres in its state of being at rest or of moving uniformly straight ahead, except insofar as it is compelled to change its state by forces impressed.

c.
Newton's second law: law of acceleration
Lex II: Mutationem motus proportionalem esse vi motrici impressae, et fieri secundum lineam rectam qua vis illa imprimitur.

The rate of change of momentum of a body is proportional to the resultant force acting on the body and is in the same direction.

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Answer 2

1. D, inertia.

2. B, increased fourfold. This isn't doubling the effect, it's squaring it, as in E equals M C(squared).

Answer 3

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Answer 4

First Question = Inertia (D.)

Second Question = Increased fourfold (B.)

Answer 5

natural tendency of an object is inertia

if you double the force, the acceleration should be doubled, i think
i could be wrong about that one

Answer 6

The answer for the first question is inertia.
The second answer is it gets doubled since F=m*a,
m constant,F doubled means a doubled.

Answer 7

Emma, you need to know why, rather than just get the answers.

Read the previous answers, and just don't quote the answers without knowing the science - otherwise you won't know next time.