SCIENCE
PHYSICAL SCIENCES
Question
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Kinetic Energy


Potential Energy


Power


Work

Detailed explanation1: The formula for potential energy depends on the force acting on the two objects. For the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters.
Detailed explanation2: Potential Energy Practice Question: Here, the mass of the object (m) = 1 kg, Displacement (height) (h) = 10 m, Acceleration due to gravity (g) = 9.8 m s–2. Hence, Potential energy (P) = m×g×h = 1 kg × 9.8 m s–2 × 10 m = 98 J.
Detailed explanation3: Definition: Gravitational Potential Energy ( PEg ) is given by: PEg = mgy, (3) where m is the mass of an object, g is the acceleration due to gravity, and y is the distance the object is above some reference level.
Detailed explanation4: Gravitational Potential Energy Formula g is the acceleration due to gravity (9.8 on Earth) h is the height above the ground in meters.
Detailed explanation5: Potential Energy : (P.E. or U) “The energy possessed by a bo tody due its position above the ground . or change in state.” UNIT : Unit of P.E. = S.I. UNIT OF ENERGY = Joule (J)