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ikadub [295]
3 years ago
9

what is newton's second law of motion? forces are balanced when they are equal and opposite. an object at rest or in motion will

remain at rest or in motion unless acted upon by an unbalanced force. the smaller the mass of an object, the greater the acceleration of that object when a force is applied. the greater the force applied, the greater the acceleration. every reaction is equal to the force applied.
Physics
2 answers:
Troyanec [42]3 years ago
6 0
The smaller the mass of an object, the greater the acceleration of that object when a force is applied because mass and acceleration are inversely related The greater the force applied, the greater the acceleration as Force and acceleration are directly related quantities.
sleet_krkn [62]3 years ago
5 0

Answer:

B

Explanation:

The Newton's second Law of motion states that:

- An object at rest or in motion will remain at rest or in motion unless acted upon by an unbalanced force.

- The expression is given by:

                                   F_net = m*a

- If F_net  = 0, then a = 0.

- However, if a = 0, not always is velocity is zero but the change in velocity is.

Hence, the object in motions travels with a constant velocity even if all the forces are balanced or no net force is present.

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Answer: Both cannonballs will hit the ground at the same time.

Explanation:

Suppose that a given object is on the air. The only force acting on the object (if we ignore air friction and such) will be the gravitational force.

then the acceleration equation is only on the vertical axis, and can be written as:

a(t) = -(9.8 m/s^2)

Now, to get the vertical velocity equation, we need to integrate over time.

v(t) = -(9.8 m/s^2)*t + v0

Where v0 is the initial velocity of the object in the vertical axis.

if the object is dropped (or it only has initial velocity on the horizontal axis) then v0 = 0m/s

and:

v(t) = -(9.8 m/s^2)*t

Now, if two objects are initially at the same height (both cannonballs start 1 m above the ground)

And both objects have the same vertical velocity, we can conclude that both objects will hit the ground at the same time.

You can notice that the fact that one ball is fired horizontally and the other is only dropped does not affect this, because we only analyze the vertical problem, not the horizontal one. (This is something useful to remember, we can separate the vertical and horizontal movement in these type of problems)

7 0
3 years ago
What is the value of x in the equation below 1+2e^x+1=9
GuDViN [60]
<h2>Answer: 1.252</h2>

Explanation:

We are given this equation and we need to find the value of x:

1+2e^x+1=9   (1)

Firstly, we have to clear x:

2e^x=9-1-1  

2e^x=7  

e^x=\frac{7}{2}     (2)

Applying<u> Natural Logarithm</u> on both sides of the equation (2):

ln(e^x)=ln(\frac{7}{2})     (3)

xln(e)=ln(\frac{7}{2})     (4)

According to the Natural Logarithm rules xln(e)=x, so (4) can be written as:

x=ln(\frac{7}{2})     (5)

Finally:

x=1.252    

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Answer:

cos 0 = 1.

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Explanation:

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Answer:

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Explanation:

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