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Motion in A Plane

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Physics Part I

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Physics

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
A stone of mass 10 kg is placed on the horizontal floor and it is pulled by a force F acting at angle 45°. What is tension in the string when it breaks off from the ground? (g = 10m/s2).

Given, 

Mass of the stone, m = 10kg

Angle at which the force is acting = 45o



When vertical component of the applied force is equal to the weight of stone, the stone will lose contact. 

i.e., F sin45o = 100 

rightwards double arrow space space straight F space equals space fraction numerator 100 over denominator sin space 45 to the power of straight o end fraction space equals space fraction numerator 100 over denominator begin display style bevelled fraction numerator 1 over denominator square root of 2 end fraction end style end fraction equals 100 square root of 2 space straight N

Therefore tension in string is 100 square root of 2 straight N.
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What are the basic characteristics that a quantity must possess so that it may be a vector quantity?

A quantity must possess the direction and must follow the vector axioms. Any quantity that follows the vector axioms are classified as vectors. 


814 Views

Give three examples of scalar quantities.

Mass, temperature and energy
769 Views

What is a vector quantity?

A physical quantity that requires direction along with magnitude, for its complete specification is called a vector quantity.
835 Views

What is a scalar quantity?

A physical quantity that requires only magnitude for its complete specification is called a scalar quantity.
1212 Views

Give three examples of vector quantities.

Force, impulse and momentum.
865 Views