It is more difficult to walk on a sandy road than on a concrete road because

A) sand is soft and concreter is hard
B) the friction between sand and feet is less than that between concrete and feet
C) the friction between sand and feet is more than that between concrete and feet
D) the sand is grainy but concrete is smooth

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Light year is a unit of

A) time
B) distance
C) light
D) intensity of light

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Rectifiers are used to convert

A) Direct current to Alternating current
B) Alternating current to Direct current
C) high voltage to low voltage
D) low voltage to high voltage

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Pa(Pascal) is the unit for

A) thrust
B) pressure
C) frequency
D) conductivity

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If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same

A) velocity
B) momentum
C) acceleration
D) kinetic energy

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