Explanation

The standard equations of motion for an object moving with uniform (constant) acceleration are

v = u + at

This is the first equation of motion, relating final velocity to initial velocity, acceleration, and time

s = ut + (1/2)at²

This is the second equation of motion, relating displacement to initial velocity, acceleration, and time

v² = u² + 2as

This is the third equation of motion, relating final velocity to initial velocity, acceleration, and displacement

Where:

v = final velocity

u = initial velocity

a = acceleration

t = time

s = displacement.

These equations are used in kinematics, which is the study of motion.

They are applicable when dealing with constant acceleration and motion in a straight line. 

Explanation

• A magnet’s effect comes from aligned magnetic domains inside it.
• Heating the magnet above its Curie temperature randomizes the domains.
• Hammering or dropping physically disturbs the alignment of domains.
• Strong opposing magnetic fields can also demagnetize it.
• Therefore, the magnet’s effect can be destroyed by heat, shock, or strong opposing fields.

Last updated on 09-03-2026

Explanation

• Sound waves are a specific type of mechanical wave
• Because they require a physical medium (solid, liquid, or gas) to propagate
• Cannot travel through a vacuum
• Radio waves, X-rays, and light Waves: These are a type of electromagnetic wave

Last updated on 09-03-2026

Explanation

Explanation

Explanation

• An inclined plane is a flat surface tilted at an angle to help move objects up or down with less effort.
• It reduces the force needed compared to lifting vertically.
• Mechanical advantage = distance along incline ÷ vertical height.

Last verified on 08-03-2026

Explanation

• Weight depends on gravitational force acting on mass.
• The Moon’s gravity is about 1/6th of Earth’s, so your weight decreases.
• Your mass remains the same, only weight changes.

Additional information:

• Weight change occurs due to difference in gravity.
• Mass is constant everywhere in the universe.

Last verified on 08-03-2026

Explanation

• Weight is the force of gravity acting on an object's mass.
• It depends on mass of the object and gravitational acceleration (g).
• Formula: Weight (W) = Mass × Gravity (W = m × g)

Additional information:

• Earth: g ≈ 9.8 m/s²
• Moon: g ≈ 1.6 m/s² (weight is less)

Last verified on 08-03-2026

Explanation

• Frictional force arises when two surfaces slide or move against each other.
  • It opposes the motion and can generate heat.
  • Friction is essential in walking, driving, and machine operation.

Last verified on 08-03-2026

Explanation