If a 791 kg car with an initial speed of 117.1 km/h is observed to coast...
If a 791 kg car with an initial speed of 117.1 km/h is observed to coast up a hill to a height 22.9 m above its starting point, how much thermal energy was generated by friction? Give your answer in kilojoules.
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If a 791 kg car with an initial speed of 117.1 km/h is observed
to coast...
a) How high a hill can a car coast up (engine disengaged) if friction is negligible...
a) How high a hill can a car coast up (engine disengaged) if friction is negligible and its initial speed is 78.0 km/h? m (b) If, in actuality, a 750 kg car with an initial speed of 78.0 km/h is observed to coast up a hill to a height 10.0 m above its starting point, how much thermal energy was generated by friction? J (c) What is the average force of friction if the hill has a slope 2.5° above...
A car of mass 850 kg is initially moving at 110 km/h at the bottom of...
A car of mass 850 kg is initially moving at 110 km/h at the bottom of a large hill. Friction coefficient of 0.9 (rubber on dry asphalt) a) How high up the hill can the car coast (engine disengaged), if work done by friction is negligible? b) If, in actuality, the car is observed to coast up to a height of 22.o m above its starting point, how much thermal energy was generated by friction?
a hill and has an initial speed of 118 km/h at the bottom of the hill....
a hill and has an initial speed of 118 km/h at the bottom of the hill. The driver takes her foot off of the gas pedal and allows the car to coast up the hill. 33% Part (b) If, in actuality, a in J? Potential 96% 1 23 02
A satellite of mass m 400 kg is observed with the initial speed v 3 km/s...
A satellite of mass m 400 kg is observed with the initial speed v 3 km/s at the initial altitude h 4000 km above the Earth's surface. The satelite descends in a free fall and hits the ocean with the final speed w. Which one of the followings statements is the correct form of the 프~ Problem 6(3 point ed push of what energy conservation in this process? these equations M stands for the mass of the Earth, and R...
a 565 kg roller coaster car at the top of a 24.0 meter hull has an...
a
565 kg roller coaster car at the top of a 24.0 meter hull has an
initial velocity of 11.0 m/s. the car travels to the bottom of the
hill and continues up the next hill
a) if the height of the next hill is exactly 27.0 m, and the
car just clears the top, how much energy was lost to friction and
drag?
24.0 m
2. A 2500 kg car is driving at 65.0 km/h on a horizontal level road. As...
2. A 2500 kg car is driving at 65.0 km/h on a horizontal level road. As it approaches a stoplight the light turns red so the brakes are applied as the car hits a patch ofice. With the brakes locked, the car travels 55.0 m before coming to a stop. A) What is the initial kinetic energy of the car? B) How much work is done by friction in stopping the car? c) What is the force of friction stopping...
A car drives up a straight incline of 4.8 km in length and .3 km in...
A car drives up a straight incline of 4.8 km in length and .3 km in height. The car moves up the incline at a steady speed of 16 m s^-1, with friction force being 500 N and total weight of car and driver being 12000 N. From the top of the incline, the road continues downwards in a straight line. At the point where the road starts to go downwards, the driver stops the engine and allows the car...
A car travels up a hill at a constant speed of 40 km/h and returns down...
A car travels up a hill at a constant speed of 40 km/h and returns down the hill at a constant speed of 60 km/h. Calculate the average speed for the round trip.
A 40-kg child slides down a curved slide starting at the top with an initial speed...
A 40-kg child slides down a curved slide starting at the top with an initial speed of 4 m/s. (a) Suppose that the slide is frictionless. Determine the speed of the child when she is 3 m below her starting height. (b) Suppose that the slide has friction. Determine the speed of the child when she is 5 m below her starting height if she starts from rest and 300 J of thermal energy is dissipated during the motion.
2. Suppose a car travels 108 km at a speed of 20.0 m/s, and uses 2.20...
2. Suppose a car travels 108 km at a speed of 20.0 m/s, and uses
2.20 gallons of gasoline. Only 30% of the gasoline goes into useful
work by the force that keeps the car moving at constant speed
despite friction. (The energy content of gasoline is 1.3 ✕
108 J per gallon.)
(a) What is the force exerted to keep the car moving at constant
speed?
N
(b) If the required force is directly proportional to speed, how
many...
a hill and has an initial speed of 118 km/h at the bottom of the hill. The driver takes her foot off of the gas pedal and allows the car to coast up the hill. 33% Part (b) If, in actuality, a in J? Potential 96% 1 23 02
A satellite of mass m 400 kg is observed with the initial speed v 3 km/s at the initial altitude h 4000 km above the Earth's surface. The satelite descends in a free fall and hits the ocean with the final speed w. Which one of the followings statements is the correct form of the 프~ Problem 6(3 point ed push of what energy conservation in this process? these equations M stands for the mass of the Earth, and R...
a
565 kg roller coaster car at the top of a 24.0 meter hull has an
initial velocity of 11.0 m/s. the car travels to the bottom of the
hill and continues up the next hill
a) if the height of the next hill is exactly 27.0 m, and the
car just clears the top, how much energy was lost to friction and
drag?
24.0 m
2. A 2500 kg car is driving at 65.0 km/h on a horizontal level road. As it approaches a stoplight the light turns red so the brakes are applied as the car hits a patch ofice. With the brakes locked, the car travels 55.0 m before coming to a stop. A) What is the initial kinetic energy of the car? B) How much work is done by friction in stopping the car? c) What is the force of friction stopping...
2. Suppose a car travels 108 km at a speed of 20.0 m/s, and uses
2.20 gallons of gasoline. Only 30% of the gasoline goes into useful
work by the force that keeps the car moving at constant speed
despite friction. (The energy content of gasoline is 1.3 ✕
108 J per gallon.)
(a) What is the force exerted to keep the car moving at constant
speed?
N
(b) If the required force is directly proportional to speed, how
many...
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