The work done by the normal force n when the box slides down a frictionless incline and gaining speed is zero.
<h3>What is normal force?</h3>
The force of contact is called the normal force. When the two surfaces are in contact with each other, then the normal force acts.
This force is applied by the solid bodies on each other in order to prevent the passing through each other.
A box slides down a frictionless incline, gaining speed. For this box, the value of work done by normal force has to be found out. Let's analyze the given condition.
- The body is gaining the speed, which means there is a change in kinetic energy.
- The change in kinetic energy is equal to the work done.
- The friction force is the product of coefficient of the friction and normal force.
- The friction force for the given case is zero. Thus, the normal force must be equal to the zero.
Thus, the work done by the normal force n when the box slides down a frictionless incline and gaining speed is zero.
Learn more about the normal force here;
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Answer:
Gravitational potential energy is 0.92414J
Kinetic energy is 0.28175J
Answer:
frogs have lungs to breath on land and gills to breath underwater that makes a frog different from each other
Answer:
Lenses produce images through REFRACTION but mirrors produce images through REFLECTION.
CONVEX lenses and CONCAVE mirrors focus light at a point. CONVEX mirrors and CONCAVE lenses spread light apart.
Explanation:
Refraction guides the image formation for lenses. Light rays are bent or refracted at both surfaces of the lens as they pass through it. With this, various effects can be obtained by focusing light rays on different range of curvatures of the lens.
Reflection guides the formation of images by plane and curved mirrors. Light rays change direction as they travel through a continuously changing medium. The law of reflection states that the angle of reflected ray is equal to the angle of incident ray upon reflection from a smooth surface.
A convex lens is curved outward causing the parallel light rays passing through it to be refracted inward. They meet at a focal point and focuses light at a single point likewise concave mirror.
A concave lens is curved inwards and light rays passing through it are refracted outward, spreading light apart which is also an action of convex mirror.
