What is the force action of hammer?
The hammer strikes the nail exerting a force on the nail. Newtons third law states that if a force is exerted on an object, the object exerts a force back. So the nail exerts a force back on the hammer.
What will happen if you hammer a piece of nail in a wood?
Answer. Explanation: If you properly time your hammer strikes, the last blow will drive the nail head slightly below the surface of the material you’re nailing into. Done properly, the shape of the hammer head will slightly countersink the nail but will not mar the wood surface at all.
Why do we prefer a heavy hammer to drill a nail in to wood?
A heavy hammer imparts large momentum, due to its large mass. Hence it is preferred to use a hammer while driving nail into wood.
Why is it easier to hammer a sharp nail respective to a blunt nail?
There is more pressure in a sharp nail, so it will be easier for it to be driven into the wood, but there is less pressure in a blunt nail as there is more surface area, which makes it harder to press in.
Why does a sharp nail easily penetrate wood but not a blunt nail?
We know that Pressure is inversely proportional to area. So, smaller area will exert more pressure, thus a sharp nail has small area that comes in contact with the object, so more pressure can be applied on the object. Therefore it becomes easy to penetratea sharp nail easily through wood than a blunt nail.
Why is it easier to push a sharp tipped pin than a blunt tipped pin into a board?
Answer. because the sharp pin has less area of contact and exerts more pressure, whereas blunt pin has more area of contact and hence exerts less pressure.
Why is it easier to push a drawing pin having pointed tip than a pin having blunt tip?
When a given force is applied, a sharp tip pin covers lesser area and exerts more pressure as P = F A P=\frac{F}{A} P=AF​. Therefore a sharp pin works better than a blunt pin.
Why does drawing pins have flattened heads?
Answer: Domed or gripped heads are sometimes preferred over flat heads as dropped flat-headed pins may easily point upward, posing a hazard. Drawing pins also pose a hazard of ingestion and choking, where they may do serious harm.
Why the tip of pin made sharper?
The ends of the nails and pins are made sharp in order to minimize the area which in turn increases the pressure.So when you hit the nail on its head , even a small force converts into a large pressure due to the small area of the tail and the nail is able to insert in the wall.
Why tip of the pin is sharp but the head is broad?
Answer. The tip of pin is sharp to have ease in penetrating it. It is made thiner and sharper so that it acquire less area so that amount of force is required is minimised. Exactly opposite at other at head to prevent it from penetration.
Why do drawing pins have a round end to push whereas the other end is sharp?
Answer: In one end of drawing pin is kept wide so as to put force on large area and the other end is very sharp so as to put the effect of pressure on a very small area. This helps the pin to penetrate the wooden board easily.
Why the tip of a sewing needle is sharp?
The tip of the sewing needle is sharp so that due to its sharp tip the needle may put the force on a very small area of the cloth producing a large pressure sufficient to pierce the cloth being stitched.
Why does a nail have a flat top?
Answer. Pointed ends occupy a very small area , as a result of which the pressure ( = force / area ) on the walls/ objects due to the applied force is more and pins / nails can easily pierce. They have a flat head for our convinience. Hope This Helps.
Why do safety pins and drawing pins have narrow and sharp tips?
Ans: Safety pins & drawing pins have narrow & sharp tips because the smaller surface area of the tip causes a high pressure and therefore, makes it easier for these objects to pierce through a given material.
Why are board pins made sharp class 8?
Pressure is defined as thrust per unit area. So, pressure is directly proportional to thrust, or the force acting vertically downwards, and inversely proportional to area. So, when board pins are made sharp, the area is less, and so, the pressure exerted is more.
How will the pressure vary if?
Answer. Thus P(pressure) is inversely proportional to A(area) provided the force applied is constant. Thus if we double the area of contact while keeping the force constant, then according to the formula the pressure should be halved.
What will happen to the pressure if we keep the force constant and change the area?
Answer: 1. If area is doubled keeping the force constant, then pressure becomes half. If force is doubled keeping area constant, then pressure becomes double.
What happens to the pressure if the area is halved?
When area is doubled , the impact on pressure acting on a object will be decreased . If area is halved, then the impact of pressure acting on the object will be increased.