Quiz 1: 9709 M1

A particle is in equilibrium when the net force acting on it is:

• Zero

• Equal to its weight

• Equal to the friction force

• Equal to the normal force

The normal reaction force acts:

• Parallel to the surface

• Perpendicular to the surface

• At an angle of 30° with the surface

• In the opposite direction of friction

If a force of 10 N is applied at an angle of 60° to the horizontal, its horizontal component is:

• 5 N

• 10 N

• 8.66 N

• 20 N

A body of mass 5 kg is in equilibrium on a rough surface. The frictional force is:

• Zero

• Less than the weight of the body

• Equal to the weight of the body

• More than the weight of the body

The resultant of two forces of 10 N each acting at 90° to each other is:

• 10 N

• 14.14 N

• 20 N

• 5 N

A ladder leaning against a wall will slip when:

• The friction is zero

• The normal reaction is zero

• The angle between the ladder and the ground is too small

• The weight of the ladder is too small

The moment of a force about a point is calculated as:

• Force x Distance from point

• Force x Mass

• Force x Acceleration

• Force / Distance from point

The center of mass of a uniform rod lies:

• At one end

• In the middle

• At 1/4th length from one end

• At 1/3rd length from one end

A body is in equilibrium when the sum of clockwise moments is:

• Greater than the sum of anti-clockwise moments

• Less than the sum of anti-clockwise moments

• Equal to the sum of anti-clockwise moments

• Zero

A particle is moving with a uniform acceleration of 2 m/s². If its initial velocity is 5 m/s, what is its velocity after 3 seconds?

• 11 m/s

• 10 m/s

• 12 m/s

• 8 m/s