Question

1. Force has _____ as well as ______.

2. Two objects repel each other. This repulsion could be due to.

i)Frictional force ii) magnetic force

iii) Magnetic or electrostatic

3. The force exerted on a ball or dough to make a flat chapathi is

_______

4. The force exerted on a ball or dough to make a flat chapathi is

________

II. Answer the following questions. 6M

5. What is a normal force? Show it with an example.

6. Why is it necessary to separate contact force into a normal force

and frictional force? Give reasons’

7. What is tension?​

Answer 1

Answer:

1. magnitude........direction

2. The 'repulsion between two objects' could be due to either a "magnetic or an electrostatic force". Explanation: Two electrically charged objects which are charged similarly like two positive charges will repel each other "along a straight line".

3. To make a chapatti from a ball of dough, we push the dough inward to reduce its thickness. So the forces applied are compressive forces.

4. The normal force is an everyday force that is felt when a surface pushes against an object that is placed on that surface. For example, when a book is placed on a table, the normal force keeps the book from falling through the table.

5. The normal force is one component of the contact force between two objects, acting perpendicular to their interface. ... Hence it is necessary to separate these two forces as they work in opposite direction in a same body and movement of a body depends on them.

6. In physics, tension is described as the pulling force transmitted axially by the means of a string, a cable, chain, or similar one-dimensional continuous object, or by each end of a rod, truss member, or similar three-dimensional object; tension might also be described as the action-reaction pair of forces acting at each end of said elements. Tension could be the opposite of compression.

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