9th class NLM

What is the full form of NLM?

• National Library of Medicine

• Nuclear Launch Mechanism

• National Language Movement

• New Life Ministries

State Newton's first law of motion.

• An object in motion will change direction on its own

• An object in motion will eventually come to a stop

• An object at rest will start moving on its own

• An object at rest will stay at rest, and an object in motion will stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Define Inertia.

• Force applied to an object

• Speed of an object

• Resistance to change in motion

• Ability to move freely

Explain the term 'momentum'.

• Momentum is the force exerted by an object in motion

• Momentum is the same as inertia

• Momentum is the energy stored in an object

• Momentum is the product of an object's mass and its velocity.

What is the SI unit of force?

• Newton (N)

• Second (s)

• Kilogram (kg)

• Meter (m)

What is the relationship between force and acceleration?

• Force and acceleration are inversely proportional

• Acceleration causes force

• Force and acceleration are directly proportional

• Force has no effect on acceleration

Explain the concept of balanced and unbalanced forces.

• Balanced forces are equal in size and opposite in direction, resulting in no change in motion. Unbalanced forces are unequal in size and/or direction, resulting in a change in motion.

• Balanced forces are equal in size and direction, resulting in a change in motion. Unbalanced forces are also equal in size and direction, resulting in no change in motion.

• Balanced forces are unequal in size and direction, resulting in a change in motion. Unbalanced forces are equal in size and opposite in direction, resulting in no change in motion.

• Balanced forces are unequal in size and opposite in direction, resulting in a change in motion. Unbalanced forces are equal in size and direction, resulting in no change in motion.

State the conditions for an object to be in equilibrium.

• The object must be moving at a constant speed.

• Net force and net torque acting on the object must be zero.

• Net force and net torque acting on the object must be non-zero.

• The object must be accelerating in a straight line.

What is the difference between mass and weight?

• Mass is the force exerted on an object due to gravity, while weight is the amount of matter in an object

• Mass is the same as weight

• Mass and weight are interchangeable terms

• Mass is the amount of matter in an object, while weight is the force exerted on an object due to gravity.

Explain the concept of friction and its types.

• Friction is the force that opposes the relative motion or tendency of such motion of two surfaces in contact. There are mainly four types of friction: static friction, kinetic friction, rolling friction, and fluid friction.

• Friction is the force that attracts two surfaces towards each other

• There are mainly three types of friction: static friction, kinetic friction, and rolling friction

• Friction is the force that helps in the relative motion of two surfaces