PLEASEEE SOOON
(Three questions)
1.) Bailey is pulling Dillon on a sled in the snow at a cons...
Physics, 16.12.2020 21:50 laiba012305
PLEASEEE SOOON
(Three questions)
1.) Bailey is pulling Dillon on a sled in the snow at a constant velocity of 1 m/s. If she is pulling with 250 N perfectly horizontally, and Dillon and the sled have a combined mass of 90 kg, what is the coefficient of friction between the sled and the snow?
2.) Juan and Michael are paddling a canoe in a lake. The total mass of the guys and the canoe is 180 kg. They are providing a paddling force of 450 Newtons and the water is providing a resistance of 375 Newtons. A) What is the acceleration of the canoe? B) If they start from rest, how fast will they be moving in 6 seconds? C) How much distance will they cover in that 6 seconds?
3.) Oscar is driving his 1000kg car to school. He has to stop at the cross walk by the gym, so he puts on his brakes. His car goes from 15 meters/ second to a stop in 5 seconds. How much force did his brakes exert on the car?
Answers: 3
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An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)
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The act of moving from one place to another. a. locomotor b. aerobic c. stationary d. static
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The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 °c, what is the final temperature? note that 1 lb = 453.6 g.
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Ways that industry and agriculture use physical properties to separate substances
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