During an investigation of kinetic energy, a student was measuring the speed of an object using photogates. They launched a 155 g puck, a total distance of 75.0 cm, on a frictionless air table. The average time needed to move this distance was 5 seconds. If the puck was moving at a constant velocity, what would the kinetic energy of the puck be as it moved between the photogates?

Q: A young boy is riding a bicycle that has a total mass (including the kid) of 27.6 kg. The boy is…

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Q: Sam’s job at the amusement park is to slow down and bring to a stop the boats in the log ride. If a…

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Q: During an investigation of kinetic energy, a student was measuring the speed of an object using…

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Q: A typical wind turbine extracts 40% of the kinetic energy of the wind that blows through the area…

A: Given Data:The mass of the wind passing the blades each second is Speed Kinetic energy is given by…

Q: Mathematically, explain how a car (A) with mass of 500 kg and velocity of 2 m/s has the same kinetic…

A: Given that:- mA=500 kgmB=20000 g=20 kgvA=2 m/svB=10 m/s

Q: Suppose an elephant has a mass of 3050 kg. How fast in meters per second does the elephant need to…

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Q: A person was trying to catch a ball with a horizontal velocity of 48 m/s. The mass of the ball was…

A: The objective of the question is to find the kinetic energy of the ball before it struck the…

Q: Miguel (m=80.0 kg) is competing in the state diving championship. He leaves the springboard from a…

A: Miguel's mass =80kgInitial height of Miguel=4m above the water surfaceInitial velocity u=6m/sTotal…

Q: A 55 kg student traveling in a car with a constant velocity has a kinetic energy of 1.6  104 J. What…

A: Write the mass of the student. m=55 kg   Write the kinetic energy. KE=1.6×104 J

Q: A soccer ball hits the goalie's hands with a horizontal velocity of 38 m/s. The mass of the soccer…

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Q: A shooting star is a meteoroid that burns up when it reaches Earth's atmosphere. Many of these…

A: Given data The mass of the meteoroid is mm = 5.64 g. The velocity of the meteoroid is vm = 48.1…

Q: A 15.0-g bullet is accelerated from rest to a speed of 780 m/s in a rifle barrel of length 72.0 cm.…

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Q: A young girl (m = 30 kg) rides a skateboard (m = 3.2 kg) at a speed of 4.2 m/s. (a) How much work…

A: Given Mass of young girl = m = 30 kg Mass of skateboard = 3.2 kg speed of young girl on skateboard =…

Q: HINT (a) How much net work (in J) is required for the cheetah reach its top speed? 28166 (b) One…

A: According to question--- Given data --- Mass m = 59 kg. Initial speed u = 0 m/sec. Final speed v =…

Q: If a 70 kg baseball player steals home by sliding into the plate with an initial speed of 10 m/s…

A: mass of player, m = 70 kg  initial speed, u = 10 m/s  final speed, v = 0 m/s

Q: A crate with mass of 2121 kg is dropped off a building 2222 m above the ground. Assuming a complete…

A: By conservation of mechanical Energy Initial potential energy = final kinetic energy Initial…

Q: what speed does a 1100 kg compact car have the same kinetic energy as a 20000 kg truck going 21 km/h…

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Q: A 71 kg student traveling in a car with a constant velocity has a kinetic energy of 1.8 x 10^4 J.…

A: We know thatK.E=12mV2V=2(K.E)mHereV=velocity of objectK.E=kinetic energy of objectm=mass of object

Q: An athlete with a mass of 63.5 kg is in a cross country race, and at one instant he has a speed of…

A: Write down the values using a suitable variable. Here. m signifies athlete mass and v signifies the…

Q: An object with a mass of m = 3.00 kg is traveling with an initial velocity of vi = (5.40î − 1.60ĵ)…

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Q: An object with mass of 10 kg is dropped from a height of 20 m from the ground. Assuming only the…

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Q: In 1995, Karine Dubouchet of France reached a record speed in downhill skiing. If Dubouchet’s mass…

A: Given, Dubouchet's kinetic energy, E= 9.96*104 J Her mass, m= 51 kg

Q: It is generally a good idea to gain an understanding of the "size" of units. Consider the objects…

A: “Since you have posted a question with multiple sub parts, we will provide the solution only to the…

Q: A 60 kg antelope gallops North with velocity v. To avoid a predator, the antelope changes direction,…

A: Calculate the initial kinetic energy. KEi=12mvi2KEi=12(60 kg)v2KEi=(30 kg)v2

Q: How much kinetic energy does a student of mass 60. kilograms running at 3.0 meters per second…

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Q: The velocity of a 1.6kg particle changes from 3i-6j m/s to -6i+3j m/s. What is the change in kinetic…

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Q: If object B also has 24 J of kinetic energy, is it moving faster or slower than object A? Find the…

A: Given , Kinetic energy of object A is  24 J  Mass of object A (mA)=  M Mass of object B (mB)= M/4

Q: A 64.0 kg cheetah accelerates from rest to its top speed of 32.5 m/s. (a) How much net work (in J)…

A: (a) According to the work energy theorem, W=∆K=12mv2-12mu2=12mv2-u2 Substitute the values, to find…

Q: A 65 kg student traveling in a car with a constant velocity has a kinetic energy of 1.9 104 J. What…

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Q: A certain truck has twice the mass of a car. Both are moving at the same speed. If the kinetic…

A: Given data:  Mass of truck = 2 × mass of car Speed of the truck and car is same. The kinetic energy…

Q: A race car with a mass of 1850 kg accelerates from rest down a race track at a rate of 21.0 m/s2. If…

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Q: A cart of mass 2 kg moves with a velocity of 0.5 m/s along the negative x-direction. The kinetic…

A: The mass of the cart, m=2 kg   The velocity of the cart along the negative x-direction, v=-0.5 m/s

Q: A 4 kg particle has an initial velocity of (6i-3j) m/s. Some time later, its velocity changes to…

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Helmholtz Free Energy

The Helmholtz free energy is a thermodynamic potential used to calculate the measure of useful work from a closed system. This system is kept at constant temperature and volume. German physicist Hermann Helmholtz introduced this concept in 1882.