Question # 1

When the stress crosses the elastic limit, then the body will :

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Break

Permanently deformed

Plasticity

None

A crate is moved by pulling the rope attached to it. it moves 10 m on straight horizontal read by a force of 100 N. How much work will be done when the rope is making an angle of 30° with the road?

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5 Joules

86 Joules

707 Joules

866 Joules

Which one is more elastic ?

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Rubber

Steel

Copper

All has equal values

The formula to determine the centripetal force is:

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Ms

mv²/r

Ns

Ns^-1

At night , the air from land to begins towards sea called:

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Land breeze

Sea breaze

Both A and B

Radiation

Andromeda is one of the billions of galaxies of known.

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Star

Asteroid

Pole

Universe

ΣF=0 is __________ condition of equilibrium:

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1st

2nd

Unstable

Stable

The tendency of doing work is called :

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Time

Energy

Force

Area

All forces are example of contract forces except:

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Air resistance

Tensional

Push force

Gravitational

If the acceleration is 10 m/s2 and mass 10kg:

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F = 99N

F = 100 Kg

F = 100 m/s2

F =100 N

The gravitational force has the ________ relation with the distance between two masses:

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Direct

Inverse

Constant

None

Ability of body to do work due to its height is called.

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potential energy

kinetic energy

gravitational potential energy

elastic potential energy

Wood, cork, cotton, wool, rubber are the eamples of:

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Conductor

Thermal conductor

Insulator

both a & b

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