ANSWERTHEFOLLOWINGQUESTIONS:-6x2=12.
1.Whatisforce?WhatchangescanbeproducedbyaForce?
2. Explain themeaningofelectromagneticforcr?
3.Whydotoolsmeantforcuttingalwayshavesharpedges??
4.Howcanyoudifferentiatebetweenacontactforceandaforceatdistance
5.Howdoyouappreciatetheroleoffrictioninfacilitatingourvariousactivities?
6.Whynetforceactingonabodywhichismovingiszero?
II FILLINTHEBLANKS:-3Marks.
1._______isacontactforce.
2.Theattractiveforcebetweenanytwomassiveobjectsiscalled_______
3.Aforcecan_______thestateofmotionofanobject
4.Pressure=_______
5.Technically,wesaythatthenetforceonthisobjectis_______
6. Thedirectionofthefrictionisalwaysoppositetothe
Answers
Answer:
1. a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity. A force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate. Force can also be described intuitively as a push or a pull.
2. The fundamental force associated with electric and magnetic fields. The electromagnetic force is carried by the photon and is responsible for atomic structure, chemical reactions, the attractive and repulsive forces associated with electrical charge and magnetism, and all other electromagnetic phenomena.
3. The smaller the area, larger the pressure on a surface for the same force. This is why tools meant for cutting and piercing always have sharp edges. By increasing the area we can also reduce the pressure on a surface for the same applied force.
4. Contact forces involve push, pull and friction. ... At a distance force is when two interacting force is when two interacting objects are not touching, for example: the moon and the Earth's seas. At a distance forces encompasses gravity and magnetism. encompasses gravity and magnetism.
5. One can hold an object due to friction . any object can move on the surface due to friction . Friction between tyres of vehicles and the road keeps them running safely and also helps to stop when brakes are applied, thus preventing accidents. We can write on paper with pen due to friction between tip of pen and paper.
6. When the net force of the body is equal to zero, it implies that the body cannot be accelerated. This follows from Newton's second law of motion. When F = 0, m × a should also be zero since F = m × a. Where F is force, m is mass and a is acceleration.
1. Pressure
2. Gravitational force
3. Change
4. pascal (pa)
5. all the forces acting on the object
6. motion