Beta Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise (Conceptual Questions)>Q 4

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A force $\vec{F} = (3 x^{2} + 2 x - 7) N$ acts on a $2 kg$ body as a result of which the body gets displaced from $x = 0$ to $x = 5 m$ . The work done by the force will be

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Important Questions on Work, Energy and Power

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Beta Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise (Conceptual Questions)>Q 5

A

2 kg

mass lying on a table is displaced in the horizontal direction through

50

cm .

The work done by the normal reaction will be

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Beta Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise (Conceptual Questions)>Q 6

A body of mass

M

tied to a string is lowered at a constant acceleration of

(\frac{g}{4})

through a vertical distance

h

. The work done by the string will be......

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Beta Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise (Conceptual Questions)>Q 7

Find work done by friction for displacement $S$ .

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Beta Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise (Conceptual Questions)>Q 8

Calculate the work done for the following. $F - d$ curves to

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Beta Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise (Conceptual Questions)>Q 9

A force

F = K x^{2}

acts on a particle at an angle of

60^{0}

with the

x -

axis. The work done in displacing the particle from

x_{1}

to

x_{2}

will be -

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Beta Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise (Conceptual Questions)>Q 10

The work done against gravity in taking

10 kg

mass at

1 m

height in

1 s

will be:

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Beta Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise (Conceptual Questions)>Q 11

A force of 10N displaces an object by 10m. If work done is 50J then direction of force make an angle with direction of displacement :

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Beta Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise (Conceptual Questions)>Q 12

A body of mass

6 kg

under a force that causes displacement in it given

S = \frac{t^{2}}{4} m

, where

t

is time. The work done by the force in

2 seconds

is