Question # 1

The Atwood machine can be used to find the acceleration due to gravity using the equation

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g = 2 (m1 x m2)/(m1 + m2) a

g = (m1 - m2)/(m1 + m2) a

g = (m1 + m2)/(m1 - m2) a

The value we get after rounding 1.47 is

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1.4

1.5

1.47

1.46

When a body is lifted through a height h, the work donw on it appears in the form of its.

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Kinetic energy

Potential energy

Elastic energy

Geothermal energy

The work done in lifting a brick of mass 2 kg through a height of 5 m above the ground will be:

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2.5 J

12.5 J

50 J

100 J

The unit of heat capacity is:

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Jkg k

JK^-1

Jkg^-1K

J^-1kg^-1K^-1

According to Archimedes principle the density of a substance is determined by using formula

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D = w1/w2 + w1 x p

D = w1w2/w2- w1 x p

D = w1/w2 - w1 x p

D = w1w2/w2- w1 x p

Einstein's mass-energy equation is

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E = mc

E = mc2

E = 2mc

E = m2c

According to law of conservation of energy increases in P.E is equal to:

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Increase K.E

Decrease in K.E

Decrease in P.E

None

The quantities that are completely decribed by only magnitude are.

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vector

Scalar

Base

Derived

The unit of π is:

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N

m

s

None

................. can be add algebraically.

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Scalar quantities

Vector

All

None

Hydraulic press is a machine which works on:

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Hook's law

Pascal's law

Boyle's law

Archimedes principle

Anticlockwise torque is taken:

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Negative

Neutral

Positive

Nil

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