Table of Contents
Which can be easily cut with a sharp knife?
Answer: Sodium Sodium is an alkali metal and is so soft that it can be easily cut by knife.
Why is it easily to cut the fruit with a sharp knife as compared to blunt knife?
It is easier to cut with a sharp knife than with a blunt one because, for the same applied force, the pressure exerted (force/area) is more in the case of a sharp knife than in the case of a blunt one as the sharp knife has lesser area.
Why do sharp knives cut vegetables easily?
A sharp knife has a relatively lesser area of contact with the vegetable, as a result, the force can effectively be concentrated on the area without getting wasted. Therefore, we always use a sharp knife in a knife for efficiency.
Why is it difficult to cut fruit with a blunt knife?
It is because the surface of the fruit is large and a blunt knife occurs more surface than a sharp knife so it doesn’t cut easily while when we use a sharp knife it cuts easily because it occurs a small surface of fruit then that of blunt knife.
Why is it difficult to cut fruit and vegetables with a blunt knife?
ANSWER: It is difficult to cut vegetables with a blunt knife because it has more area compared to a sharp knife, which means that the pressure exerted by the blunt knife is less than that of the sharp knife.
Why is it easier to cut an apple with a sharp knife?
We know that the area of sharp edged knife is much less than the area of blunt edged knife. Since pressure = Force/area, therefore for the given force pressure will be more for the sharp edge than for the blunt edge knife. That is why it is easy to cut an apple with a sharp knife than with a blunt knife.
Why does a sharp knife cut objects more effectively than a blunt knife Class 8?
Pressure is inversly proportional to area and sharp knife has less area which exert more pressure while blunt knife has more area so it exert less pressure this is the reason sharp knife cut better. It is easier to cut with a sharp knife than with a blunt one.
Why is it difficult to cut vegetables with a butter knife?
If surface area increases (for a blunt knife it becomes more than the area for a sharp knife), then pressure decreases. If pressure decreases then less force is applied on the vegetables resulting in difficulty in cutting them.
Why is a sharp knife better?
Use a sharp knife Here’s why: A dull blade requires more pressure to cut, increasing the chance that the knife will slip with great force behind it. A sharp knife “bites” the surface more readily.
Why does a sharp knife cut objects more?
A sharp knife cuts objects better because of its very thin edge, a large pressure can be created on the object when the force falls over a sharp small area of our hand. And this large pressure results in the cutting of the object easily. A blunt knife does not cut the object easily because it has a thicker edge.