Explanation

Stress = Force / Area

Given:

Diameter = 12 mm, so Radius = 6 mm = 0.006 m

Force = 10,000 N

Length = 11 m (not needed for stress, needed for strain)

Area = π x r²

Area = 3.14 x (0.006)²

Area = 0.00011304 m²

Stress = 10,000 / 0.00011304

Stress = 88,419,412 Pa

*Stress = 88.42 MPa ≈ 88.46 MPa

Last verified on 31-10-2026

Explanation

μ = Frictional Force / Normal Force

μ = Newton / Newton

Newton cancels, so it has no unit. It is dimensionless.

Last verified on 26-10-2026

Explanation

• Electric potential is a scalar quantity, so potentials from different charges are added algebraically.
• Equal positive and negative charges produce equal and opposite potentials at points that are equidistant from them.
• Their net electric potential is therefore zero at those points.

Last verified on 31-10-2026

Explanation

• A scalar quantity has magnitude only and no direction.
• Speed tells us how fast an object moves, without specifying its direction.

Additional information:

• Velocity, acceleration, and force are vector quantities because they have both magnitude and direction.

Last verified on 31-10-2026

Explanation

• Young's Double Slit Experiment demonstrates the wave nature of light through interference.
• When light passes through two narrow slits, the waves overlap and produce alternate bright and dark fringes.
• Bright fringes result from constructive interference, while dark fringes result from destructive interference.

Last verified on 31-10-2026

Explanation

• Atmospheric pressure decreases as altitude (height above sea level) increases.
• Air becomes less dense at higher altitudes, so the weight of the air above decreases.
• Atmospheric pressure is highest at sea level and decreases with increasing height.

Last verified on 31-10-2026

Explanation

• Mechanics is the branch of physics that studies the motion of objects and the forces acting on them.
• It includes kinematics (motion without considering forces) and dynamics (motion and its causes).
• Statics studies objects in equilibrium.

Last verified on 31-10-2026

Explanation

• For dry surfaces, limiting static friction is generally independent of the apparent area of contact.
• It depends on the nature of the surfaces in contact and the normal reaction.
• Static friction adjusts according to the applied force until it reaches its maximum value (limiting friction).

Last verified on 31-10-2026

Explanation

• Newton’s First Law of Motion is also called the Law of Inertia.
• It states that an object remains at rest or continues moving at a constant velocity in a straight line unless acted upon by an unbalanced external force.
• Inertia is the tendency of an object to resist changes in its state of rest or motion.
• Proposed by: Sir Isaac Newton in Principia Mathematica (1687).

Last verified on 15-10-2026

Explanation

• At the highest point, the object's instantaneous velocity becomes zero.
• Kinetic energy depends on the square of velocity, so it becomes zero.
• At this point, gravitational potential energy is maximum (neglecting air resistance).

Last verified on 31-10-2026