Question # 1

Periodic motion is a motion.

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Under the influence of an elastic restoring force

That repeats it self in equal intervals of time

Back and forth over the same path

With constant acceleration

The 1st condition of equilibriums satisfied if.

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Linear acceleration is zero

Angular acceleration is zero

The vector sum of all the forces is zero

The vector sum of all the torque is increase

The SI unit of impulse is.

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N m

N s

Kg ms -1

Both b and c

Temperature changes when two balls collide which one of the following is conserved.

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Angular momentum

linear momentum

Velocity

Kinetic energy

Two bullets a and b have masses 1 kg and 12 kg respectively.

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K.E. of B will be twice that of A

K.E. of A will be twice that of B

Both have same K.E.

K.E. of A will be half that of B

The relation between horse power and watt is.

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1 hp = 546 watts

1 hp = 746 watts

1 hp = 946 watts

1 hp = 1000 watts

Which quantity has dimensions different from the others.

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Energy per unit volume

Force per unit area

Angular momentum per unit mass

Pressure

The resultant magnitude of two vectors

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Is always positive

Can never be zero

Can be negative positive or zero

Is usually zero

The diver spins faster when moment of inertia becomes

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Smaller

Greater

Double

zero

Which of the following is not an elastic collision

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A man jumps on a cart

A bullet embedded in a block

Colliding of two glass balls

Colliding of two tennis balls

If two non zero vectors are perpendicular to each other then their scalar product is equal to.

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-1

1

0

Infinity

If the average velocity of an object zero in some time interval, the displacement of the object for that interval will be.

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Infinite

Zero

Increasing

Decreasing

If a vehicle is to gain momentum it must

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Lose weight

Move slowly

Lose inertia

Accelerate

When a projectile reaches the highest point the vertical component of velocity becoems.

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Small

Vi cos thetha

Zero

Maximum

If the earth stopped rotating the weight of objects at either pole would.

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Be grater

Be less

Vary with altitude

Be the same before

The total energy of a body executing SHM is directly proportional to

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The amplitude

The square of the amplitude

Square root of the amplitude

Reciprocal of the amplitude

The pascal is not the SI derived unit of.

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Pressure

Stress

work

Tensile strength

Light year is a unit of

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Light

Velocity

Time

Distance

A body in equilibrium may not have

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Velocity

Momentum

Acceleration

K.E

Solar cells are thin wafers made from

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Uranium

Nickel

Silicon

Cadmium

A horizontal force of 15 N accelerates a 4 kg object rom rest along a horizontal surface at a rate of 3 m s-2 At the end of 2 s the objects momentum will be.

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12 kg m s-1

24 kg m s-1

30 kg m s-1

45 kg m s-1

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