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3 years ago

What affect does a doubling of the net force have upon the acceleration of the object?

Physics

2 answers:

balandron [24]3 years ago

5 0

F = ma
a = f/m
if f doubled , acc. will be doubled

algol [13]3 years ago

3 0

Answer: It doubles the acceleration of the object.

Explanation: The second Newton's law says that the acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object.

This can be written as A = F/m

where A is acceleration, F is force and m is mass.

If we doubled the net force, now we have:

A = (2F)/m = 2(F/m)

So now the acceleration is two times the previous acceleration.

This means that if we double the net force, we also double the acceleration of the object. (notice that this works for ani factor, if we multiply the net force by a real number K, the acceleration also is multiplied by the number K)

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A wheel of radius R, mass M, and moment of inertia I is mounted on a frictionless, horizontal axles. A light cord wrapped around

Alex_Xolod [135]

Answer:

$\alpha =\frac{m*g*R}{I-m*R^2}$

$a = \frac{m*g*R^2}{I-m*R^2}$

$T=\frac{I*m*g}{I-m*R^2}$

Explanation:

By analyzing the torque on the wheel we get:

$T*R=I*\alpha$ Solving for T: $T=I/R*\alpha$

On the object:

$T-m*g = -m*a$ Replacing our previous value for T:

$I/R*\alpha-m*g = -m*a$

The relation between angular and linear acceleration is:

$a=\alpha*R$

So,

$I/R*\alpha-m*g = -m*\alpha*R$

Solving for α:

$\alpha =\frac{R*m*g}{I+m*R^2}$

The linear acceleration will be:

$a =\frac{R^2*m*g}{I+m*R^2}$

And finally, the tension will be:

$T =\frac{I*m*g}{I+m*R^2}$

These are the values of all the variables: α, a, T

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3 years ago

A girl weighing 45kg is standing on the floor, exerting a downward force of 200N on the floor. The force exerted on her by the f

sukhopar [10]

Answer:

Equal to 200 N..........

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3 years ago

A vehicle of known mass accelerates along a straight path. According to Newton's second law of motion, what caused this accelera

Naily [24]

The answer would be:

C. An unbalanced force has acted on the vehicle.

The presence of an unbalanced force will accelerate an object, the second law of motion dictates this (Although not explicitly). Lets knock out the rest of the choices.

If a balance force acted on the vehicle, then the vehicle would be at rest. The mass of the vehicle did not change (Unless it falls apart, which I doubt). The direction of the vehicle does not change and it will only do so if another force and a stronger one at that will counteract the current net force acting on the vehicle.

Hope you got your answer here, although you did not ask for an explanation, maybe this will help you figure some of the other questions you have on your own.

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3 years ago

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alexgriva [62]

Answer:

I think u are traeling at speed of light and not ur friend

Explanation:

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3 years ago

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A block with a weight of 9.0 N is at rest on a horizontal surface. A 1.2 N upward force is applied to the block by means of an a

lesya [120]

Answer:

a) 9 - 1.2 = 7.8 N

b) Since the force exerted by the box is it's weight, it acts in a downward direction. So the box will exert a force downward (perpendicular to the horizontal surface).

Explanation:

A 9N block would exert 9N of normal force on the horizontal plane under normal conditions. But in this case, we have a spring taking away some of the force by applying an upward force on the box.

So the force exerted by the box on the surface would now be:

a) 9 - 1.2 = 7.8 N

b) Since the force exerted by the box is it's weight, it acts in a downward direction. So the box will exert a force downward (perpendicular to the horizontal surface).

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3 years ago