A shooting star is a meteoroid that burns up when it reaches Earth's atmosphere. Many of these meteoroids ae quite small. What is the kinetic energy of a meteoroid of mass 5.64 g moving at a speed of 48.1 km/s? What is the kinetic energy of a 1098-kg car moving at 29.1 m/s (65.1 mi/h)? What comparison can be drawn between the kinetic energy of the meteoroid and that of the car?

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Q: 1. What is the total mechanical energy (TME) of a 1000kg motorcycle resting on the top of a 10m…

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Q: In one day, a 75 kg mountain climber ascends from the 1500 m level on a vertical cliff to the top at…

A: Δh1=First day change in height=2400−1500=900 mΔh2=Second day change in height=1350−2400=−1050…

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Q: A linear spring has a free length of 39.4 cm. When it is under a hanging load of 27340N, its total…

A: Given: The initial length of the spring is 39.4 cm. The final length of the spring is 739.4 cm. The…

Q: "A 2.0 g bead slides along a frictionless wire, shaped like a roller coaster track. At point A (100…

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Q: what is the PE of a 4 kg object that is 5 m above the ground?

A: Given data:     The mass of the object is: m = 4 kg The height of the object from ground level is: h…

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A: According to the law of conservation of energy , energy can neither be created nor destroyed but can…

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A: C) As per the work-energy theorem, the friction’s work done can be represented as, Here, E, m, v,…

Q: What is the Net Work ? Wnet = Fnetd cos θ Cart Mass, mc . 284 kg Angle, theta 49 degrees…

A: Work done is defined as the force applied multiplied by the distance traveled. Work done done is…

Q: What is the Net Work ? Wnet = Fnetd cos θ Cart Mass, mc . 284 kg Angle, theta 49 degrees…

A: Work done is defined as the energy required to move an object from one place to another by applying…

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Q: What is the Net Work ? Wnet = Fnet d cos Θ    Cart Mass, mc . 284 kg Angle, theta 49 degrees…

A: The net work done on the system is, Wcart=msmcg-mc2gsinθmc+msd

Q: What could be the kinetic energy of a 0.8kg encyclopedia sitting on top of a table? a. 0 J b. 1 J…

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

A: Kinetic Energy = 0.5 m v2

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

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A: Given  Massof stone m=2.40kg Initial velocity vi=6.20i-1.80j Final velocity vj=8i+4j

Q: In the figure, a block of mass m = 3.90 kg slides head on into a spring of spring constant k = 320…

A: Given information: Here, m is the block’s mass, k is the spring’s constant, x is the compression,…

Q: In the figure, a block of mass m = 2.70 kg slides head on into a spring of spring constant k = 440…

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Q: A block with mass m=2.5 [kg] slides head-on to a spring with spring constant k=320 [N/m]. When the…

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Q: A stone with a mass of 3.20 kg is moving with velocity (5.20î − 2.00ĵ)m/s.  (HINT: v2 = v · v.) (a)…

A: The mass of the stone m=3.20 kg The initial velocity of the stone v1=(5.20î − 2.00ĵ)m/s The kinetic…

Q: "A 2.0 g bead slides along a frictionless wire, shaped like a roller coaster track. At point A (100…

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Q: A cheetah has 5 joules of kinetic energy and runs up a 5 m hill. When it gets to the top of the…

A: potential energy only due to position  = m g h according to law of conservation of energy loss in…

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A: Given: The mass of the duck is 3 kg. The speed of the duck is 2 m/s.

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A: (3) Write the mass of the object. m=500 kg   Write the initial height of the object. h=40 m

Q: Q28. A boy climbs onto a wall that is 3.4 m high and gains 2250 J of potential energy. What is the…

A: Here,  height of the wall (h) = 3.4 m potential energy (U) =2250 J acceleration due to gravity(g)=…

Q: Consider a mass m=81.6 kg sliding on a frictionless surface as shown in the figure below. It begins…

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

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Q: A 58.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 128…

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Q: What is the Net Work ? Wnet = Fnetd cos θ Cart Mass, mc . 284 kg Angle, theta 49 degrees Distance,…

A: Given: The mass of the cart, M = 0.284 kg The magnitude of suspended mass, m = 0.3 kg The distance…

Q: A 0.300-kg football is thrown through the air. At a height of 1.71 m above the surface of Earth, it…

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Q: A hydroelectric generator converts kinetic energy of water into electrical energy. Each second 2264…

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Q: A ball with a mass of 2.20 kg is moving with velocity (5.60î – 1.20j) m/s. (HINT: v2 v.) = V. (a)…

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Q: A large cruise ship of mass 6.00 x 10' kg has a speed of 10.4 m/s at some instant. (a) What is the…

A: Given data:Mass of the ship, m = 6.00 x 107 kg.Speed of the ship, v1 = 10.4 m/s

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A: Given Weight of projectile w=2.943 N Initial speed u=20 m/s angle θ=30

Q: In compressing the spring in a toy dart gun, 0.6 J of work is done. When the gun is fired, the…

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Q: C7 19.) You reach out the second story window, which is 5 m above the sidewalk, and throw a 0.5 kg…

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A: Given: The mass of the object is 50 kg. The acceleration due to gravity is 9.8 m/s. Then altitude is…

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Q: An accelerating object of mass m=4 kg is fired with an initial speed v=3 m/s at a starting point. If…

A: Initial velocity, u =3 m/s Mass, m = 4 kg Final Kinetic energy, K.E.2=380 J

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.