Explore the many different forms energy can take sound heat light chemical and nuclear. Three class periods program description much of our success as an industrialized society stems from our ability to harness energy.
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In fact any type of energy can be converted into any other type of energy.
Work power and energy worksheet for grade 8 pdf. Rkhedrick last modified by. Work energy and power page. Reverberated through the hall.
P 2 07 104watts 2 a 0 45 kg book sits on a shelf 1 80 m above the floor. Energy can t be created or destroyed it can only be changed from one type into another type. E p 7 95j.
Work work and energy are the same thing. In physics power is associated with energy and has a precise meaning. It is the rate of work done or rate of energy transfer.
The capacity of doing work is called energy. Mathematically work done force distance. It can also be defined as the rate of change of energy.
Physical science lesson duration. Work power and energy 2 work if an object or system such as your body exerts a force on an object and that force causes the object s position to change you are doing work on the object. 5 a bass drum s 6 the states that matter is made ot particles.
6 energy work and power conversion of energy we have already explained how kinetic energy and gravitational potential energy can be converted backwards and forwards. A calculate the gravitational potential energy of the book relative to the floor. Use the following diagram for questions 10 and 11.
9 computer screens are lit through. Work and energy grade 8 print answer key pdf take now schedule copy. Work energy and power in this section of the transport unit we will look at the energy changes that take place when a force acts upon an object.
Rate of doing work is called power. Energy work and power teacher s guide grade level. Power is measured in joules per second j s r o watts w and is worked out using the formula.
When a force moves. Which situation is an example of increasing potential energy. We call this rule conservation of energy.
Work is said to be done when the force is applied on a body and the body covers a certain distance. Is created by the motion ot the particles within 4 the dim light bulb s strength was one down 2 measures the power ot an engine. Worksheet work power and energy sections 9 1 9 6 1 what is the power of a crane that does 5 80 x 104 j of work in 2 80 s.
The concept of power is concerned with how rapidly energy is being transferred or transformed when work is done. Work power and energy worksheet author. Steven higginbotham created date.
In some cases this conversion can be done efficiently such as between kinetic energy and electrical energy. 3 when a physicist is talking about work he mainly talks about a force causing a displacement of an object in the same action of line. Print test only the test content will print name.
How much power did he use. Consider a 10 kg mass sitting on the ramp shown to the right. Mathematically energy mass x gravity x.
Causes waves to bend 8 a loud noise has a high count.
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