binocular
velocity
At 180 degrees the net force is at a minimum; the two are working against one another.
Yes, light does produce heat. When light is absorbed by an object, the energy from the light is converted into heat, which can raise the temperature of the object. This is why objects can feel warm when exposed to sunlight or other sources of light.
No. Any object that is hot enough will produce light, regardless of what heated it.
If you can't see through an object clearly it is an opaque object.
velocity
That's called a 'balanced' group of forces. Their effect on the object's motion is the same as the effect of zero force ... the object may rotate, but it won't accelerate.
The object's dimensions. Multiplied together they give the objects volume.
The tendency of a force to produce rotation is called torque. It is a measure of the force's ability to make an object rotate around an axis.
Reflection
net
Forces acting on an object that produce a change in its motion are known as net force. Net force is calculated by combining all the individual forces acting on the object in the same direction.
force
The force that occurs when molecules of an object are pushed together is called compression force. This force causes the molecules to move closer to each other, resulting in a decrease in the object's volume.
A torque acting on an object tends to produce rotation.
The overall force of an object after all the forces are added together is called the net force. It is the combination of all the individual forces acting on an object, taking into account both their magnitudes and directions. Net force determines the object's resulting motion or lack thereof.
net