A 0.7 kg block attached to a spring with force constant 160 Nm is free to move on a frictionless, horizontal surface. The block
1 answer:
Answer:
+ 24 N
Explanation:
the computation is shown below:
Given that
Mass of the block = m = 0.7 kg
Sprint constant = k = 160 N / m
x = 0.15m
Now the force on the block is
F = kx
= (160) (0.15)
= 24 N
As the instant block is released so the acting of the force on the block is positive and it would be in a positive direction i.e. right direction
Therefore the third option is correct
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Force is a vector quantity, so it has a magnitude and a direction.
The SI units of the force is the Newton (N).
Whenever an unbalanced force is applied to an object, the object experiences an acceleration, according to Newton's second law of motion:
where
F is the force
m is the mass of the object
a is its acceleration
So, the acceleration of an object is proportional to the force applied:
6)
In physics, arrows are used to represent vector quantities. Therefore, they are also used to represent forces.
In particular, when a vector quantity is represented by an arrowr:
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Therefore, if a force is represented through an arrow:
- The length of the arrow shows the strength (magnitude) of the force
- The direction of the arrow shows the direction of the force
7)
As we said in part 5), the SI units of the force is the Newton (N).
We can rewrite the Newton in terms of fundamental units only. We can do it starting from the equation:
where
F is the force
m is the mass
a is the acceleration
- The mass is measured in kilograms (kg)
- The acceleration is measured in meters per second squared ()
Therefore, 1 N corresponds to:
B)
Gravity is an attractive force that exists between all objects that have mass. See more explanations about gravity in part 4).
3)
Mass is a scalar quantity; it gives us a measure of the "amount of matter" contained in an object.
The SI unit of the mass is the kilogram (kg).
Being a scalar, mass has no direction, but only a magnitude.
Moreover, the mass is an intrinsec property of an object: therefore, it does not depend on the location of the object. So, an object has always the same mass, either it is on Earth or on another planet.
On the other hand, the force of gravity on an object depends on its location, so it changes.
4)
As we said in part 3), gravity is an attractive force that exists between all objects that have mass.
The magnitude of the force of gravity between two objects is given by the Universal Law of gravitation:
where
G is the gravitational constant
m1, m2 are the masses of the two objects
r is the separation between the objects
From the equation above, we observe that:
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And so:
a. When the mass of one or both objects increases, the gravitational force between the objects increases
b. When the distance between two objects increases, the attraction between the objects decreases