The work done in lifting a 30 kg set of bricks to a height of 20m is We all know the FORMULA IN FINDING WORK is W = F x D Where W is work; F is force; and D is distance However, let us first discuss what work really is. When there is an object being moved by a force through a certain distance, the measure of energy transfer is what we call WORK . One of the most common units used in work is JOULES (commonly used as a unit of energy). It is the work by which 1 Newton (1N = 1 kg.m/sec^2) of force is used/expended through a distance of 1 meter (1m). Refer to the problem. It is said that the 30 kg set of bricks are to be raised in a height of 20 meters. As we see, there is no force given. But recall that force (F) is the product of mass (m) of an object and its acceleration (a) F = ma However, in the formula, (g = 9.81 m/s^2) or acceleration due to gravity is used in replacement of (a) because the object is moving upward. So now we have F = mg Thus, we have the new ...
What changes (temperature and kinetic energy) takes place in the melting process? Changes in temperature and kinetic energy take place during phase change, in this case the melting process, because a melting object takes in thermal energy from its environment. The temperature of a melting object increases , this is because the object takes in heat from the environment in an attempt to achieve equilibrium as stated in the laws of thermodynamics. Also, once an object takes in thermal energy, its kinetic energy also increases. Remember that temperature is just the measure of kinetic energy (in the atomic level, via vibration of atoms) an object has. If the temperature increases, we can say that the kinetic energy of an object (in the atomic level) increases. For more information about thermal energy, heat, and melting, you may check the links below. brainly.ph/question/803878 brainly.ph/question/808302 brainly.ph/question/205501
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