PhysicsTeacher.in

High School Physics

Energy_21

Derivation of Gravitational potential energy equations

Deriving equations of Gravitational Potential Energy (1)with planet’s surface as the zero level & (2)infinity is chosen as the zero level, 1] If we choose a planet’s surface as the zero level or reference, Gravitational Potential Energy Ep at x has a positive value.
If infinity is chosen as the zero level, Ep has a negative value.
Gravitational potential energy Ep = (mg) × h = mgh (if we choose a planet’s surface as the zero level or reference).
Gravitational potential energy Ep can be expressed as Ep = – G m1m2 / r (if infinity is chosen as the zero level).


Derive an expression for the potential energy of elastic stretched spring

Here we will obtain or derive an expression for the potential energy stored in the spring, also known as the elastic potential energy. To get this equation, we’ll calculate the work done to stretch or compress a spring that obeys Hooke’s law. Hooke’s law states that the magnitude of force F on the spring and the resulting deformation ΔL are proportional, F = kΔL, where k is a constant. We, therefore, derive the equation of the potential energy of a spring, also known as the elastic potential energy as follows: PE=(1/2)kx2 where k is the spring’s force constant and x is the displacement from its undeformed position.elastic potential energy represents the work done on the spring and the energy stored in it as a result of stretching or compressing it a distance x . The potential energy of the spring PEs does not depend on the path taken; it depends only on the stretch or squeeze x in the final configuration.

Relation between kinetic energy and momentum | Derivation of p=√(2mk) or momentum-KE equation

In this post, we will find the relation between kinetic energy and momentum. We will also derive the momentum-kinetic energy equation or p=√(2mk) equation. This momentum-KE equation presents the relation between momentum(p) and kinetic energy(K). momentum-kinetic energy equation | p=√(2mk) The relation between momentum(p) and kinetic energy(K) of an object of mass m can be […]

Comparison of Scissors & shears with their mechanical advantage

Explain why scissors for cutting cloth may have blades longer than handles, but shears for cutting metals have short blades and long handles. – to explain this we need a comparison of Scissors & shears with their mechanical advantage. Scissors and shears apparently may look identical. Both of them belong to the class I lever, […]

Potential Energy

What Is Potential Energy?Potential energy is a form of stored energy – it is the energy possessed by a body at rest due to its position or size or shape. By doing work, forces act to increase and decrease the kinetic energy of objects within a system. If the kinetic energy that’s removed can be […]

Numerical on Work Energy Power solved worksheet class 10 ICSE, CBSE

This post is focused on Numerical Problems on Work, Energy, Power with solutions, and a problem worksheet for you. This is very useful for high school students studying Physics, more precisely for class 10 students of ICSE, CBSE, international boards like IGCSE, state boards, etc.) Numerical Problems on Work, Energy, Power | class 10 ICSE, […]

Numerical Problems Based on Lever’s mechanical advantage

Here you will find Numerical Problems based on Lever’s mechanical advantage. Try to solve and if required refer to the solutions given. We will continuously add newer problems. Formula Used Mechanical Advantage = Effort arm / Load armMechanical Advantage = Load/effort To get the Concepts of fulcrum location for 3 types of levers: read about […]

Velocity Ratio – definition, formula, and values

The Velocity Ratio of a machine and the Velocity Ratio Formula are the topics of this physics article. Also, we will see how the value of the Velocity Ratio varies in the case of speed multiplier machines and Force multiplier machines. Velocity Ratio | Definition of Velocity Ratio The velocity ratio of a machine is […]

What is Power Class 9

In this post, we will define Power (in physics), and list down different formulas of power. We will also solve a sample numerical using the power formula and concept.

Mechanical advantage Formula – MA formula

In this post, we will talk about the Mechanical advantage formula (MA formula) for different simple machines. Mechanical advantage Formula | MA formula The Mechanical advantage formula (MA formula) can be written as follows: (1) Mechanical Advantage MA = output force/input force (2) Mechanical Advantage MA = resistance force/effort force. The machine uses this resistance […]

Freefall in physics

In this post, we will find out (a) how to find the weight of a freely falling body (b) How the velocity of a freely falling body changes every second if we ignore air drag force (air resistance)? (c) Why do we feel weightless during freefall (d) Kinetic energy of a body under free fall (e) Applicability of Law of conservation of energy for free fall (e) how distance traveled per second varies

Work done by a force

Work done by a force – In Physics Work is done by a force only if the object on which the force is applied makes a displacement. Without this displacement, work done is zero irrespective of the force applied. Work done by a force depends on the 3 parameters: (a) the force applied (b) The […]

Mechanical Advantage of a Lever with Formula

The mechanical advantage of a lever is the ratio of the load the lever overcomes and the effort a person or system applies to the lever to overcome some load or resistance. In simple words and as per the formula, it’s the ratio of load and effort. The formula of the mechanical advantage(MA) of a lever […]

Scroll to top
error: physicsTeacher.in