1. What happens to the total energy of a moving object if there is NO external applied on it? a. It increases b. It decreases c. It remains constant d. increases then decreases 2.A particle is thrown upward with some kinetic energy. What happened to its kinetic energy at the highest point or height it reaches? a. Its kinetic energy is lost b. It’s all kinetic energy is absorbed by the air c. Its kinetic energy is converted to potential energy d. Its kinetic energy is remain same 3. A construction worker holds a heavy tool box at 1.5 meters high. How much work is done by the worker? a. Zero b. F x cos θ c. mgH d. ½ mv^2

Q: Which of the following statements is true about potential energy for the given figure? point A point…

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Q: A 2.2 kg rock is held 10 meters above the ground and dropped. Using your knowledge of CONSERVATION…

A: Mass of rock (M) = 2.2 kg  Height of rock (H)  = 10 m  Acceleration due to gravity (g) = 10 m/s2

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Q: Do it

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Q: When a box slides across a floor and comes to rest, what happens to the energy of its motion? a. it…

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Q: 3. Energy can be transferred between different objects or can be transformed between different types…

A: Please post the remaining questions separately! I will be doing question number 3.

Q: Q4. The figure below shows a 500 gram block of wood falling from a certain height. KE: :0 - V, =0…

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Q: the height of the Iguazu Falls is 82 m. A log of wood with mass 1350 kg moves at 7ms -1 in the water…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

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A: work energy theorem. Work done is equal to change in Kinetic energy. W = K.E 2- K.E 1 K.E. 2 -…

Q: potential energy

A: Since you have asked multiple question, we will solve the first question for you. If youwant any…

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Q: b. How much energy was dissipated due to friction in the process?

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A: Given, Mass of log of wood m =1350 kginitial speed is v0=7 m/s

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Q: How much work is done when a 4kg block of ice is moved from rest to a speed of 5m/s?   A. 50 J…

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Q: potential energy

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A: Given, m=5.0×102kgvA=3.8 m/shA=5.0m

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Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.