Amass of 4kg suspended by a light string 2m long and at rest is projected horizontally with a velocity of 1.5 m/s. find the angle made by the string when the mass comes to momentary rest

19.5°

Explanation:

The energy of the mass must be conserved. The energy is given by:

1)

where m is the mass, v is the velocity and h is the hight of the mass.

Let the height at the lowest point of the be h=0, the energy of the mass will be:

2)

The energy when the mass comes to a stop will be:

3)

Setting equations 2 and 3 equal and solving for height h will give:

4)

The angle ∅ of the string with the vertical with the mass at the highest point will be given by:

5)

where l is the lenght of the string.

Combining equations 4 and 5 and solving for ∅:

6)

when cloud cover increases then the suns ray's which provides the earth with light and warmth gets covered due to the due to the suns ray's being blocked, the temperature in that region

therefore to conclude i would like to say that,

=more the cloud cover, the lesser the

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