When using a sharp knife, the force produced on the knife acts on a very small area of fruit. Pressure is inversely related to the area across which force is exerted. As a result, a sharp knife can exert more pressure than a soft knife for the same force. As a result, fruits can be readily cut with a sharp knife.

Can easily be cut with a sharp knife?

Solution: Pressure is inversely proportional to the area of the surface. A sharp knife has a smaller area that comes in contact with the object and hence more pressure can be applied on the object. Therefore it is easier to cut with a sharp knife.

Why is a sharp knife used to cut an apple?

Explain why? 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 is it easy to cut fruits and vegetables with a sharp knife?

And Pressure is inversely proportional to Area, the more the area, the less the pressure and the less the area, the more the pressure. A sharp knife has less area, thus pressure applied will be more , and that’s why it’s easier to cut Vegetables with a sharp knife than a blunt knife , even if we apply same force.

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 easier to cut an apple with a sharp knife class 8?

Explanation: The sharp end of knife has much smaller area compared to its blunt end. Smaller area provides more pressure for the applied force. Hence, it becomes easier to cut an apple with sharp end of knife compared to with its blunt end.

Why is a sharp knife more effective in cutting a fruit than a blunt knife Class 8?

A sharp knife has larger contact surface area and hence applies more pressure.

Can we cut an apple without using a knife?

Another kitchen hack that you need to try is no other than dental floss. Mainly, this was used for your teeth. However, it has the capability to cut and slice soft foods into pieces. Instead of using a knife, a dental floss would be an ideal alternative like no other.

Why is cutting vegetables with a blunt knife not easier class 8?

Pressure is inversely proportional to force and area . So ,when pressure increases the Force and Area Decreases. Similarly , as in the case of blunt knife the Force and Area is increased , so the pressure decreases. That’s why it is difficult to cut the vegetables with blunt knife with less amount of pressure.

Why is it difficult to cut vegetables with a blunt knife 8?

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.