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Registration Login. Toggle navigation HOME. Science Geography History Civics. Science History. Ans: A push or a pull on an object is called a force.
Q2: What is change in state of motion? What brings change in state of motion? Ans: A change in either the speed of an object, or its direction of motion, or both, is described as a change in its state of motion. Q3: What is the difference between contact forces and non-contact forces?
Ans: Forces which act only when there is physical contact between two interacting objects are known as Contact forces. Q4: Give two example each of the situation in which you apply force to change state of motion of an object and to change shape of an object?
Ans: A goal keeper applies force for saving a goal. Q5: Why is it difficult to hold a school bag having a strap made of a thin and strong string? Ans: It is difficult to hold a school bag having a strap made of a thin and strong string because it apply the large pressure on the shoulders due to very small contact surface area. Q6: Why Porters wear turbans when they have to carry heavy loads on their heads? Ans: Porters wear turbans when they have to carry heavy loads on their heads, to increase the area of contact.
Ans: A force applied on an object may change its speed. Q8: Why Lorries and trucks carrying heavy loads have 8 tyres instead of four? Ans: Lorries and trucks carrying heavy loads have 8 tyres instead of four. Q9: Why the sucker sticks to the surface over which it is pressed? Ans: When we press the sucker, most of the air between its cup and the surface escapes out. Q What is pressure? How is pressure related to the surface area on which it acts?
Ans: Force per unit area is called pressure. Q When we stop pedalling the bicycle, it slows down and gradually stops. Ans: When we stop pedalling the bicycle, it slows down and gradually stops because of force of friction between the surface of tyres of cycle and the ground that brings moving bicycle to rest. Ans: The force acting against the relative motion of surfaces in contact is called frictional force or friction.
Q What is magnetic force? What happens when we bring like poles of two magnets closer? Ans: A magnet can exert force on another magnet without being in contact with it; this force is known as magnetic force. Q What is gravitational force? Is gravity the property of earth alone? Ans: Every object exerts a force on every other object. Q A rocket has been fired upwards to launch a satellite in its orbit. The hair also may be combed and the turban retied after work, before evening prayers, or before bedtime.
Prior to tying a turban:. Sikh men or women who wear a keski often tie a second turban, or domalla , over the keski. A chunni is a long, lightweight scarf worn by many Sikh women to cover their hair and may also be used to adorn a keski or a turban. Many Sikh children wear a square piece of turban called a patka tied over their joora. They may have their kes braided before being bound up so as to keep it from becoming tangled should their turban come off during play or while asleep.
At bedtime an Amritdhari , or initiated Sikh, may choose to:. Style and color may reflect association with a particular group of Sikhs, a personal religious conviction, or even fashion. Turbans are available in many different styles, fabrics, and colors.
A longer turban is usually worn in a formal setting and may be color coordinated to the occasion. Popular traditional colors of religious significance are blue, black, white, and orange. Red is often worn for weddings. Patterned or tie-dyed turbans are worn sometimes simply for fun. Many have decorative embroidery. Turbans also come in a variety of fabrics from lightweight to heavy such as:. Scarf styles worn by Sikh women as head covers include:. Turbans may be adorned and embellished, either simply or elaborately, to reflect Sikhism's martial tradition:.
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The reason why Muslims may wear a turban is because it reflects the spirit of Islam that seeks to remind people of God. When praying Muslims are required to cover their heads as they are in the presence of their Lord. Covering the head is a sign of showing respect to God.
Similarly some Muslims choose to cover their heads at other times as a reminder of their faith and of God. The form of head covering is not prescribed so can range from caps and hats to turbans. In the Asian and Arabian culture the turban also symbolised that the person was a man of learning and wisdom. Thus it served as a reflection of what a true Muslim should be — one who is ever-mindful of his Creator and ever-inclined to seek knowledge.
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