Engineering Mechanics
The wheels of a moving car possess

Potential energy only
Kinetic energy of translation only
Kinetic energy of rotation only
Kinetic energy of translation and rotation both

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Engineering Mechanics
The static friction

Always acts in a direction, opposite to that in which the body tends to move
All of these
Is independent of the area of contact, between the two surfaces
Bears a constant ratio to the normal reaction between the two surfaces

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Engineering Mechanics
Non-coplanar non-concurrent forces are those forces which

Do not meet at one point and their lines of action do not lie on the same plane
None of these
Do not meet at one point but their lines of action lie on the same plane
Meet at one point, but their lines of action do not lie on the same plane

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