Answer: A net force is the overall force on an object when all the individual forces acting on an object are added together. When there is a net force acting on an object, the force is said to be unbalanced. With balanced forces, equal forces are exerted in opposite directions providing a net force of zero
Example of scalar: speed. Example of vector: velocity
Explanation:
In physics, there are two types of quantities:
- Scalar: a scalar quantity is a quantity having only magnitude, so it is just a number followed by a unit. Examples of scalar quantities in physics are:
Mass
Time
Speed
- Vector: a vector quantity is a quantity having both a magnitude and a direction. Examples of vector quantities in physics are:
Force
Acceleration
Velocity
The two types of quantities can be used in the same event, but in a different way. One of the most common example is the difference between speed and velocity.
In fact, let's consider an object moving in a uniform circular motion: it means that it is moving in a circle at a constant speed. The speed of the object measures only how fast the object is moving, but without telling anything about its direction of motion. The velocity, viceversa, also takes into account the direction of motion, and exactly for this reason, the velocity in a uniform circular motion is not constant, because the direction (it is a vector) is constantly changing. So, in a uniform circular motion, the speed is constant but the velocity is not.
Learn more about vectors:
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<h3><u>Answer:-</u></h3>
1115.2 Joules
<h3><u>Given :- </u></h3>
<h3><u>Solution</u> :-</h3>
As the block falls , the change in potential energy will be converted into kinetic energy
Potential Energy at rest at height,
= 
Potential Energy when fell at height,
= 
Kinetic energy= Change in Potential energy = = 
The answer to your question is,
A scientific law.
-Mabel <3
Explanation:
It is given that, a solid metal sphere of diameter D is spinning in a gravity-free region of space with an angular velocity of ω.The sphere is slowly heated until it reaches its melting temperature, at which point it flattens into a uniform disk of thickness D/2.
The angular momentum remains conserved in this case. The relation between the angular momentum and the angular velocity is given by :
Where
are moment of inertia of sphere and the disk respectively
Here, volume before = volume after
Initial angular momentum,
..........(1)
Final angular momentum,
............(2)
From equation (1) and (2) :
Hence, this is the required solution.
