A small 142 gram (0.142 kg) pinewood derby car sits at the top of a 1.20 meter high sloped racetrack.  How fast will the car be going as it crosses the finish line at the bottom of the slope if it loses 5.0% of its energy to friction? (use 9.81 m/s2 for gravity)

Q: 2. What is the mass of a truck if its kinetic energy is 5500 J and travels at a speed of 65 km/h. 65…

A: Given. Mass = m velocity = 65 km/h V = 65*1000/3600 m/s. V = 18.055 mps.

Q: A 15 × 10² g ball is thrown straight up in the air with an initial upward velocity of 25 m s-'.…

A: Given  Mass of ball m=1500g=1.5kg Initial speeed v=25m/s

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: a .40 kg block initially at rest on a frictionless horizontal surface is acted upon by force of 5.0…

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Q: A block of ice with mass 3.00 kg slides 2.00 m down an inclined plane that slopes downward at an…

A:

Q: Bolum-7+A2B1C3UUXI As a 2.00-kg object move from (21 + 5)) m to(6l-2/) m, the constant resultant…

A: Given: Mass of object m = 2.0 kg S1 = 2i + 5j S2 = 6i -2j Force on the object F = 4i - 3j Initial…

Q: a)Gayle runs at a speed of 3.80 m/s and dives on a sled, initially at rest on the top of a…

A:

Q: S. A 10kg object is raised to a height of 20m. What is the magnitude of its potential energy?…

A: Given data,      Height  =  h       Mass  =   m      Acceleration due to gravity  =  g…

Q: A center hurls a basketball m = 1 kg straight up with an initial speed of v0 = 7.5 m/s. He releases…

A:

Q: A body of mass 16 kg initially at rest is subject to a force 4 N. What is the kinetic energy…

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Q: What is the velocity of a 4.8 x103 kg truck whose kinetic energy is 125 kJ? O 9.18 m/s O 6.29 m/s O…

A:

Q: "A toy rocket, weighing 10 N, blasts straight up from ground level with a kinetic energy of 40 J. At…

A: GivenWeight of the rocket = 10 kinetic energy of the rocket at ground level, K = 40 Jtotal…

Q: An accelerating object of mass m=7 kg is fired with an initial speed v;=8 m/s at a starting point.…

A: Given: mass of object m = 7 Kg initial speed vi = 8m/s Final kinetic energy KEf = 369 J To find:…

Q: When a 1984 Alfa Romeo Spider sports car accelerates at the maximum possible rate, its motion during…

A:

Q: 1. If the kinetic energy of an arrow is doubled, by what factor has its speed increased? (a) √2…

A: let the mass of arrow = m let original speed = v original kinetic energy ( E) = (1/2)(m)(v)2

Q: It takes 157 kJ of work to accelerate a car from 23.4 m/s to 27.3 m/s. What is the car's mass?

A: Given, Work done, W=157 kJ Initial velocity, u=23.4 m/s Final velocity, v=27.3 m/s

Q: If a 1.5 kg chicken is running with a speed of 10.0 m/s, its kinetic energy is:   Question 19…

A: Given data:  Mass (m) = 1.5 kg Speed (v) = 10.0 m/s Required: Kinetic energy

Q: 12. A mass of 1 kg. was released from a 1,000 meter height. What is its Kinetic Energy at the middle…

A: Given that- M=1kg Heigh(h)=1000m    To determine that- What is it kinitic energy at the middle of it…

Q: How long will it take a 844-kg car with a useful power output of 48.5 hp (1 hp equals 746 W) to…

A:

Q: It takes 212 kJ of work to accelerate a car from 21.7 m/s to 29.2 m/s. What is the car's mass?

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Q: What is the maximum kinetic energy of a bowling ball with a mass of 6.1 kg, dropped from the 116m…

A: Maximum kinetic energy of ball will be just before the ball hits the ground, as at that time speed…

Q: A 1300-kg car moving on a horizontal surface has speed y = 50 km/h when it strikes a horizontal…

A: The kinetic energy will equal to the elastic potential energy. mv22=kx22

Q: puck’s

A: The work-energy theorem can be applied here, work done=change in kinetic energy Work done by a body…

Q: A 1000.0 kg car is moving at 15 km/h. If a 2000.0 kg truck has 15 times the kinetic energy of the…

A: Given: The mass of car is m=1000 kg. The mass of truck is m'=2000 kg. The speed of car is v=15…

Q: Is the answer I choose the correct one?

A: GivenWeight of the car W = 8000 NInitial velocity u = 12 m/sFinal velocity v = 0 m/sTime taken t =…

Q: Water flows over a section of Niagara Falls at a rate of 1.4 × 106 kg/s and falls 60 m. What is the…

A: Given: The rate of mass of the water=dmdt=1.4×106 kg/s. The height of the fall=h=60 m Acceleration…

Q: A 100 kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 200…

A: Given value--- mass = 100 kg. horizontal force = 200 N. first distance = 15 m. second distance = 15…

Q: Q14) A 55-kg athlete climbs an 8 m long rope in 10 s. His average power output (in W) is A) 431 B)…

A: Mass of athelete = 55 kg  Vertical distance = 8 m  Time = 10 second

Q: It takes 156 kJ of work to accelerate a car from 20.4 m/s to 28.2 m/s. What is the car's mass?

A: The mass of the car can be calculated in given steps:Given:

Q: An object with a mass of 500 g is released from a helight of 40 m. Since the air friction is…

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

Q: How much gravitational potential energy (in J) (relative to the ground on which it is built) is…

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Q: Harriet is practicing archery. As she draws back an arrow, the arrow has 34.3 J of elastic potnetial…

A: Write a given values of this question. Elastic potential energy. PEelastic=34.3J Gravitational…

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

A:

Q: Which has more kinetic energy, a 0.0020-kg bullet traveling at 400 m/s or a (6.4 x 107 )-kg ocean…

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Q: An object of mass m= 7.6 kg is free to move on a horizontal surface without any friction. It is…

A: Given : mass of the object, m = 7.6 kg Initial velocity, u = 0 m/s Force, F = (3 N)i^ + (4 N)j^ So ,…

Q: 5. What is the kinetic energy of a box of mass 0.75 [kg] sliding on a frictionless surface at a…

A: mass of box (m) = 0.75 kg constant speed (v) = 3 ms

Q: On a frozen pond, a 8.54-kg sled is given a kick that imparts to it an initial speed of…

A:

Q: On a frozen pond, a 8.54-kg sled is given a kick that imparts to it an initial speed of…

A:

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

A:

Q: What is the kinetic energy of a 900 kg car whose velocity is 60 km/hr? Group of answer choices 125…

A:

Q: A 0.697 kg football is thrown upward with an initial speed of 49.7 m/s.  Neglecting wind resistance,…

A: Given: m=0.697 kg vo=49.7 m/s g=9.8 N

Q: Two cars are moving. The first car has twice the mass of the second car, but only half as much…

A: Given, Mass of car A (mA)= 2m Mass of car B(mB)= m Kinetic energy of car A (KA)= K Kinetic energy of…

Q: A 8000-N car is traveling at 14 m/s along a horizontal road when the brakes are applied. The car…

A: Ans. (d) 80 J   kinetic energy =12mv2given,weight, w = 8000 Nacceleration due to gravity, g =9.8…

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