NSTSE (National Science Talent Search Exam- Unified Council) Class 9: Questions 1405 - 1406 of 2000

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Question number: 1405

» Physics » Work, Energy & Power

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MCQ▾

Question

Calculate the work done in raising a stone of mass and specific gravity lying at the bed of a lake through a height of .

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 1406

» Physics » Work, Energy & Power

Edit
MCQ▾

Question

In which of the following cases, is the work done minimum?

Choices

Choice (4)Response

a.

Angle αAngle α: Angle between B, A, CVector uVector u: Vector [A, B] Vector uVector u: Vector [A, B] Vector vVector v: Vector [A, C] Vector vVector v: Vector [A, C] ⧵vec Ftext1 = “⧵vec F”⧵vec Ftext1 = “⧵vec F”⧵vec stext1_1 = “⧵vec s”⧵vec stext1_1 = “⧵vec s”30⧵degreetext2 = “30⧵degree”30⧵degreetext2 = “30⧵degree”30⧵degreetext2 = “30⧵degree”

Vectors of F and S (Choice A)

b.

Angle αAngle α: Angle between B, A, CVector uVector u: Vector [A, B] Vector uVector u: Vector [A, B] Vector vVector v: Vector [A, C] Vector vVector v: Vector [A, C] ⧵vec Ftext1 = “⧵vec F”⧵vec Ftext1 = “⧵vec F”⧵vec stext1_1 = “⧵vec s”⧵vec stext1_1 = “⧵vec s”90⧵degreetext2 = “90⧵degree”90⧵degreetext2 = “90⧵degree”90⧵degreetext2 = “90⧵degree”

Vectors of F and S (Choice B)

c.

Angle αAngle α: Angle between B, A, CVector uVector u: Vector [A, B] Vector uVector u: Vector [A, B] Vector vVector v: Vector [A, C] Vector vVector v: Vector [A, C] ⧵vec Ftext1 = “⧵vec F”⧵vec Ftext1 = “⧵vec F”⧵vec stext1_1 = “⧵vec s”⧵vec stext1_1 = “⧵vec s”5⧵degreetext2 = “5⧵degree”5⧵degreetext2 = “5⧵degree”

Vectors of F and S (Choice C)

d.

Vector uVector u: Vector [A, B] Vector uVector u: Vector [A, B] Vector u_1Vector u_1: Vector [A_1, B_1] Vector u_1Vector u_1: Vector [A_1, B_1] ⧵vec Ftext1 = “⧵vec F”⧵vec Ftext1 = “⧵vec F”⧵vec stext1_1 = “⧵vec s”⧵vec stext1_1 = “⧵vec s”

Vectors of F and S (Choice D)

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