Explanation

• Power is the dot product of force and velocity.
• The formula is P = F · v = Fv cosθ, where θ is the angle between force and velocity.
• When force and velocity act in the same direction, power is P = Fv.
• The SI unit of power is the watt (W), equivalent to one joule per second.

Last verified on 28-10-2026

Explanation

• Radian is the unit of plane angle.
• It was traditionally classified as a supplementary quantity in the SI system.
• One radian is the angle subtended at the centre of a circle by an arc equal in length to the radius.

Last verified on 28-10-2026

Explanation

• The slope of a momentum–time graph represents the rate of change of momentum.
• According to Newton's second law, the rate of change of momentum is equal to the net force acting on an object.
• The relationship is F = Δp / Δt, where p represents momentum and t represents time.
• A steeper slope indicates a greater net force, while a horizontal line indicates zero net force.

Last verified on 28-10-2026

Explanation

• Mass and Length are base quantities in SI units.
• Length SI Unit: meter (m)
• Mass SI Unit: kilogram (kg)

Additional information:

Base Quantities in SI System:

• Time (second)
• Electric current (ampere)
• Temperature (kelvin)

Last verified on 16-06-2026

Explanation

• The negative of the potential gradient is equal to the electric field intensity.
• The electric field points in the direction in which electric potential decreases most rapidly.
• The mathematical relation is E = -dV/dr, where E is electric field intensity and V is electric potential.
• The negative sign indicates that electric potential decreases in the direction of the electric field.

Last verified on 28-10-2026