The moment of a force is -----.

• A) base
• B) negative
• C) scalar
• D) vector

Turning effect of force is termed as-------.

• A) Action of force
• B) Action of torque
• C) Moment of torque
• D) Unstable action of force

A uniform rod CD of mass m is placed on two supports at A and B. If the rod is on the point of tilting about A then which of the following must be true about the reaction force at B?

• A) it would be zero
• B) it would be -ve
• C) it would be +ve
• D) it cannot be deternmined

The ability of an object to return to its original position after it has been tilted slightly is termed as-------.

• A) Equilibrium
• B) Stability
• C) Centre of gravity
• D) Turning effect

The resolved part of the force exerted by a body to another body along the tangent at the point of contact is called the ………

• A) Central force
• B) Centripetal force
• C) Centrifugal force
• D) Force of friction

For a smooth contact, coefficient of friction is always.........

• A) 1/4
• B) 1/2
• C) 1
• D) 0

The ratio of limiting friction to the normal reaction is called the ------ of the friction.

• A) coefficient
• B) none of these
• C) Direction
• D) Magnitude

If the limiting friction is 20N and the normal reaction is 40N, then the coefficient of friction is -----------

• A) 0.5
• B) 0
• C) 2
• D) 1

The resolved part of the force exerted by a body to another body along the normal at the point of contact is called the ………

• A) centrifugal force
• B) Normal reaction
• C) centripetal force
• D) central force

Which of the following is NOT a possible coefficient of friction?

• A) 0
• B) 0.5
• C) -0.5
• D) 1

The friction between two bodies is said to be -------- friction if neither body is on the point of sliding along the other.

• A) limiting
• B) none of these
• C) static
• D) dynamic

The friction between two bodies is said to be ----- friction if one body slides along the other.

• A) Static
• B) Limiting
• C) Dynamic
• D) None of these

If a body can have a smooth contact with every other body then such a body is said to be a ------ body.

• A) Rigid
• B) Rough
• C) None of these
• D) Smooth

If the friction between two bodies in contact is not zero, then the bodies are said to be -------- bodies.

• A) smooth
• B) rigid
• C) none of these
• D) rough

A uniform rod AB of mass m is placed on two supports at C and D. If the rod is on the point of tilting about D then which of the following must be true about the reaction force at D?

• A) It would be -ve
• B) None of these
• C) It would be +ve
• D) It would be zero