Physics, 26.06.2019 23:10 jc624826

Aroller coaster car sits at rest at the top of 40 m hill (y = 40 m). the zero line for this problem is located at the bottom of the hill (y = 0). a) what is the change in potential energy as car moves from point a to point b? b) what is the speed of the car at the bottom of the hill? c) what is the speed of the car when it reaches point b? d) the car is released from point a again, but this time it only reaches a height of 25.0 m above the reference point. if the mass of the car is 1000 kg and the car travelled a distance of 400 m, estimate the magnitude of the frictional force between the car and the track.

Answers: 2

Show answers

Another question on Physics

Physics, 22.06.2019 02:30

The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?

Answers: 3

Answer

Physics, 22.06.2019 03:00

Classify each possible hypothesis about a medicinal aloe vera plant as falsifiable or non-falsifiable. aloe vera gel is the best natural skin moisturizer. aloe vera gel can heal wounds by boosting cell renewal. aloe vera juice tastes better than carrot juice. drinking aloe juice can reduce the risk of lung cancer.

Answers: 1

Answer

Physics, 22.06.2019 13:50

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?

Answers: 3

Answer

Physics, 22.06.2019 21:40

Ahair dryer is basically a duct in which a few layers of electric resistors are placed. a small fan pulls the air in and forces it through the resistors where it is heated. air enters a 1200 w hair dryer at 100 kpa and 22°c and leaves at 47°c. the cross-sectional area of the hair dryer at the exit is 60 cm2. neglecting the power consumed by the fan and the heat losses through the walls of the hair dryer, determine (a) the volume flow rate of air at the inlet and (b) the velocity of the air at the exit.

Answers: 1

Answer

You know the right answer?

Aroller coaster car sits at rest at the top of 40 m hill (y = 40 m). the zero line for this problem...

Questions

Physics, 25.01.2022 02:20

Question 2 of 10 What type of system allows matter and energy to enter and exit? O A. Connected OB. Open O C. Closed O D. Isolated...