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 friction-less 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: A basketball of mass 0.599 kg is dropped from rest from a height of 1.25 m. It rebounds to a height…

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Q: A 56 kg student traveling in a car with a constant velocity has a kinetic energy of 1.3 104 J. What…

A: Given that,Mass of student : m = 56 (kg)Kinetic energy : K.E. = 1.3×104 (J)Here we need to find the…

Q: A 7.0 kg bowling ball moves at 2.25 m/s. How fast must a 3.00 g Ping-Pong ball move so that the two…

A: Given information:Mass of the bowling ball (mb) = 7.0 kgMass of the ping pong ball (mp) = 3.00 g =…

Q: Helen asked her mom to take her to the play ground near her house. She loves to scare her mom by…

A: Mass of Helen m=20.4 kg Helen is initially at a height h=3.30 m Since she starts from rest her…

Q: The superheroine Xanaxa, who has a mass of 66.7 kg, is pursuing the 79.7 kgkg archvillain Lexlax.…

A: Initially, the potential energy of superheroine will be, Since the Superheroine leaps from the…

Q: A student at another university repeats the experiment you did in lab. Her target ball is 0.860 m…

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Q: A 4-kg stone is dropped from a height h and strikes the ground with a velocity of 25 m/s. (a) Find…

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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: Olivia fires an arrow at a bird sitting 20m up in a tree. The arrow has a mass of 0.010 kg and…

A: Given height of the bird from the ground = 20m  mass of an arrow = m = 0.010 kg  initial bow speed =…

Q: Two sledders go down a steep hill for which friction is negligible on identical sleds. Sledder A has…

A: Mass of sledder A = 50 kg Mass of sledder B = 75 kg

Q: A toad with mass of 188 g leaps into the air to catch a fly. If the toad's jump was at an angle of…

A: Given: Toad's mass, m=188 g=0.188 kg Toad's jumping angle w.r.t horizontal, θ=35° Initial velocity,…

Q: A girl and her bicycle have a total mass of 60 kg. At the top of the hill her speed is 5.0 m/s. The…

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Q: A single force F(x) = -4.0x (in newtons) acts on a 1.0-kg body. When x = 3.5 m, the speed of the…

A: Given Data: Fx=-4x Nm=1.0 kgSpeed of the body at x=3.5 m is, 4.0 m/s

Q: Releasing some frustration at the end of the semester, you throw your physics book (mass of 2.7 kg)…

A: Given: m=2.7 kg h=25 m v=6 m/s Thermal energy=284 J

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

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Q: At what speed does a 1900 kg compact car have the same kinetic energy as a 20000 kg truck going 24…

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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 diesel engine pumps out 49 kg of water in one second. The water comes out vertically upwards with…

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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: In a circus act, a 60 kg clown is shot from a cannon with an initial velocity of 16 m/s at some…

A: Given,

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: A 1.000 ´ 103 kg car is moving at 90.0 km/h (25.0 m/s) as it exits a freeway. The driver brakes to…

A: mass = 1000 kg initial speed = 25 m/s final speed = 10 m/s   Yes, the work was done by the car…

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 block of 2 kg slides down a ramp with a height of 1.5 m, then hits and sticks to another block of…

A: Given: The mass of the first block is 2 kg. The mass of the second block is 4 kg. The height of the…

Q: A toad with mass of 117 g leaps into the air to catch a fly. If the toad's jump was at an angle of…

A: Given data The mass of the toad is m=117 g The angle of projection is θ=26o The initial velocity is,…

Q: A large cruise ship of mass 6.00 x 10 kg has a speed of 12.8 m/s at some instant. (a) What is the…

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Q: mr.berkley is driving his car down lake park at 21 m/s. He sees something in the road and slows down…

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Q: A 2-lb stone is dropped from a height h and strikes the ground with a velocity of 50 ft/s. (a) Find…

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Q: A 1000kg car moving at 22.8 m/s on a flat road slams on the brakes and skids to a stop. The…

A: Mass of the car (m) = 1000 kgInitial velocity (v) = 22.8 m/sCoefficient of kinetic friction () =…

Q: A 1-kilogram rock is thrown directly downward from the top of a 70-meter-tall building with an…

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Q: For its size, the commonflea is one of the most accomplished jumpers in the animal world.A…

A: Given: The height which can be achieved by person is h=60 cm. The mass of person is m=65 kg. The…

Q: A 300 g hockey puck is shot across an ice-covered pond. Before the hockey puck was hit, the puck was…

A: We have to determine the change in energy of punk over time.

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.