Car A and Car B of equal mass travel up a hill. Car A moves up...
Car A and Car B of equal mass travel up a hill. Car A moves up the hill at a constant speed that is half as much as the constant speed of Car B. Compared to the power developed by Car B, the power developed by Car A is
a.twice as much
b. the same
c. half as much
d. four times as much
Homework Answers
12) (5 points) A roller coaster car moves around a vertical circle. At the bottom of...
12) (5 points) A roller coaster car moves around a vertical circle. At the bottom of the circle, the car experiences four times as much acceleration as at the top of the circle. Compared to its speed at the top of the circle, the speed of the car at the bottom of the circle is A) 4 times as great. B) 2.8 times as great. C) 1.4 times as great. D) 16 times as great. E) twice as great.
A car with a mass 1,000kg is parked on a hill with a slope of 7.0°....
A car with a mass 1,000kg is parked on a hill with a slope of 7.0°. The parking brake is released and the car starts to roll down the hill. A) Assuming that friction is negligible, what will be the force that moves the car down the hill. B) What will be the speed of the car after 50 seconds?
You push a box of mass 16.3 kg with your car up to an icy hill...
You push a box of mass 16.3 kg with your car up to an icy hill slope of irregular shape to a height 4.5 m. The box has a speed 12.3 m/s when it starts up the hill, the same time that you brake. It then rises up to the top (with no friction) before immediately falling off a sheer cliff to the ground (with no drag). (a) What is the speed of the box at the top of the...
؟ A car (1000 kg) climbs up a hill sloped at 28° while traveling at constant...
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A car (1000 kg) climbs up a hill sloped at 28° while traveling at constant speed of 80 km/hr, what is the power (kW) required for the uphill motion? Select one: a. power 108.7 kW. b. power 89.6 kW. c. power 119.7 kW. d. power 102.3 kW. e. power 95.9 kW. Question 10
12. As a car goes up a hill, there is a force of friction between the...
12. As a car goes up a hill, there is a force of friction between the road and the tires rollingon the road. The maximum force of friction is equal to: A) the normal force of the road times the coefficient of kinetic friction. B) the normal force of the road times the coefficient of static friction. C) zero. D) the weight of the car. E) the weight of the car times the coefficient of kinetic friction. 13. If a...
A car (1000 kg) climbs up a hill sloped at 28° while traveling at constant speed...
A car (1000 kg) climbs up a hill sloped at 28° while traveling at constant speed of 75 km/hr, what is the power (kW) required for the uphill motion? Select one: O a. power 95.9 kW. O b. power 119.7 kW. c. power 89.6 kW. d. power 108.7 kW. e power 102.3 kW.
You push a box of mass 22.6 kg with your car up to an icy hill...
You push a box of mass 22.6 kg with your car up to an icy hill slope of irregular shape to a height 4.3 m. The box has a speed 12 m/s when it starts up the hill, the same time that you brake. It then rises up to the top (with no friction) to a flat area before coming to a rest when hitting a box of mass 89 kg. The heavier box then falls off a sheer cliff...
thermal and heat question A car (1000 kg) climbs up a hill sloped at 28° while...
thermal and heat question
A car (1000 kg) climbs up a hill sloped at 28° while traveling at constant speed of 80 km/hr, what is the power (kW) required for the uphill motion? Select one: O a. power 102.3 kW. O b. power 95.9 kW. O c. power 108.7 kW. O d. power 89.6 kW. O e. power 119.7 kW.
Satellite A has twice the mass of satellite B, and circles in the same orbit. Compare the two satellite's speeds. The s...
Satellite A has twice the mass of satellite B, and circles in the same orbit. Compare the two satellite's speeds. The speed of B is twice the speed of A. The speed of Bis half the speed of A. A. The speed of Bis one-fourth the speed of A. The speed of B is equal to the speed of A. The speed of Halley's Comet, while traveling in its elliptical orbit around the Sun, O is constant increases as it...
Problem 1: A car of mass 1000 kg moves at a constant speed of 20 m/s...
Problem 1: A car of mass 1000 kg moves at a constant speed of 20 m/s along a horizontal road where a frictional force is 200N. Calculate the power developed by the engine. If the car now moves up an incline at the same constant speed, calculate the new power developed by the engine. Assume that the frictional force is still 200 N and that sin(theta)=1/20 where theta is the angle of the incline to the horizontal. Problem 2: An...
12) (5 points) A roller coaster car moves around a vertical circle. At the bottom of the circle, the car experiences four times as much acceleration as at the top of the circle. Compared to its speed at the top of the circle, the speed of the car at the bottom of the circle is A) 4 times as great. B) 2.8 times as great. C) 1.4 times as great. D) 16 times as great. E) twice as great.
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A car (1000 kg) climbs up a hill sloped at 28° while traveling at constant speed of 80 km/hr, what is the power (kW) required for the uphill motion? Select one: a. power 108.7 kW. b. power 89.6 kW. c. power 119.7 kW. d. power 102.3 kW. e. power 95.9 kW. Question 10
12. As a car goes up a hill, there is a force of friction between the road and the tires rollingon the road. The maximum force of friction is equal to: A) the normal force of the road times the coefficient of kinetic friction. B) the normal force of the road times the coefficient of static friction. C) zero. D) the weight of the car. E) the weight of the car times the coefficient of kinetic friction. 13. If a...
A car (1000 kg) climbs up a hill sloped at 28° while traveling at constant speed of 75 km/hr, what is the power (kW) required for the uphill motion? Select one: O a. power 95.9 kW. O b. power 119.7 kW. c. power 89.6 kW. d. power 108.7 kW. e power 102.3 kW.
You push a box of mass 22.6 kg with your car up to an icy hill slope of irregular shape to a height 4.3 m. The box has a speed 12 m/s when it starts up the hill, the same time that you brake. It then rises up to the top (with no friction) to a flat area before coming to a rest when hitting a box of mass 89 kg. The heavier box then falls off a sheer cliff...
thermal and heat question
A car (1000 kg) climbs up a hill sloped at 28° while traveling at constant speed of 80 km/hr, what is the power (kW) required for the uphill motion? Select one: O a. power 102.3 kW. O b. power 95.9 kW. O c. power 108.7 kW. O d. power 89.6 kW. O e. power 119.7 kW.
Satellite A has twice the mass of satellite B, and circles in the same orbit. Compare the two satellite's speeds. The speed of B is twice the speed of A. The speed of Bis half the speed of A. A. The speed of Bis one-fourth the speed of A. The speed of B is equal to the speed of A. The speed of Halley's Comet, while traveling in its elliptical orbit around the Sun, O is constant increases as it...
Problem 1: A car of mass 1000 kg moves at a constant speed of 20 m/s along a horizontal road where a frictional force is 200N. Calculate the power developed by the engine. If the car now moves up an incline at the same constant speed, calculate the new power developed by the engine. Assume that the frictional force is still 200 N and that sin(theta)=1/20 where theta is the angle of the incline to the horizontal. Problem 2: An...
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