How high a hill can a car coast up (engine disengaged) if work done by friction...

How high a hill can a car coast up (engine disengaged) if work done by friction is negligible and its initial speed is 104 km/h?

42.6 m

If, in actuality, a 870–kg car with an initial speed of 104 km/h is observed to coast up a hill to a height 31.9 m above its starting point, how much thermal energy was generated by friction?

9.11×104 J

What is the average force of friction if the hill has a slope 7.7° above the horizontal?????

Solutions

Expert Solution

milcah answered 1 year ago

Next > < Previous

Related Solutions

Is work done when dragging a mass up a hill the same as the change in...

Is work done when dragging a mass up a hill the same as the change in potential energy? Is work the same as energy? I am confused as to why

A 1150 kg car drives up a hill that is 15.7 m high. During the drive,...

A 1150 kg car drives up a hill that is 15.7 m high. During the drive, two nonconservative forces do work on the car: (i) the force of friction, and (ii) the force generated by the car's engine. The work done by friction is −2.91×105 J ; the work done by the engine is 6.74×105 J . Find the change in the car's kinetic energy from the bottom of the hill to the top of the hill.

1. Real heat engines, like the gasoline engine in a car, always have some friction between...

1. Real heat engines, like the gasoline engine in a car, always have some friction between their moving parts, although lubricants keep the friction to a minimum. Would a heat engine with completely frictionless parts be 100% efficient? Why or why not? Does the answer depend on whether or not the engine runs on the Carnot cycle? Again, why or why not? 2.Some critics of biological evolution claim that it violates the second law of thermo- dynamics, since evolution involves...

You push a box of mass 19.1 kg with your car up to an icy hill...

You push a box of mass 19.1 kg with your car up to an icy hill slope of irregular shape to a height 5.9 m. The box has a speed 12.9 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 sliding into a box larger box of mass 13 kg. The boxes then fall off a sheer cliff together to the...

You push a box of mass 17.4 kg with your car up to an icy hill...

You push a box of mass 17.4 kg with your car up to an icy hill slope of irregular shape to a height 5.1 m. The box has a speed 11.8 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 elastically colliding with a smaller box of mass 12 kg. The boxes then fall off a sheer cliff individually to the...

A.) Find the work done by an ideal engine which extracts 8900.0 J of heat from...

A.) Find the work done by an ideal engine which extracts 8900.0 J of heat from its hot resevior while operating between 550.0 K and 370.0 K. B.) The work from the engine goes into an ideal refridgerator which extracts 5300.0 J of heat from its cold resevior. FInd the coefficient of performance of the ideal refridgerator.

A car has a sticker price of $94,000.The car has a 100 hp engine and can...

A car has a sticker price of $94,000.The car has a 100 hp engine and can accelerate from 0 to 60 mph in 15.8 seconds. The lease rate is 3.7%. The term of the lease is three years. The buyout is $45,120 at the end of the lease. Assume that the lease has three annual payments with the first payment due on signing. a) What are the before-tax lease payments assuming no down payment? b) With leases, sales tax is...

In detail, describe how waste engine oil can be reused in car again, its application and...

In detail, describe how waste engine oil can be reused in car again, its application and treatment method.

How best can we optimise the production of work in a heat engine? Provide the theoretical...

How best can we optimise the production of work in a heat engine? Provide the theoretical framework in a real steady-state process.

A car is going up a hill. While doing so, its speed is decreasing. What forms...

A car is going up a hill. While doing so, its speed is decreasing. What forms of energy does it have? Select all forms that are present. (It's gas tank is not empty). A) kinetic energy B) chemical potential energy C) thermal energy D) gravitational potential energy 2. For the same car, while going up the hill with decreasing speed, which forms of energy are increasing in amount? A) kinetic energy B) chemical potential energy C) gravitational potential energy D)...

Subjects