3. A rocket car is traveling on a linear horizontal frictionless track when it suddenly runs out of fuel. The car has achieved a speed of 100 meters per second at the very moment the fuel is completely spent. The track then suddenly changes to a 30-degree incline from the horizontal.
(A) Calculate the maximum height above the horizontal track the car will rise just as it comes to a complete stop.
(B) Calculate the distance; measured along the inclined track, the car will travel before coming to a complete stop.
(C) Calculate the total travel time of the car on the inclined plane from the time it enters the track to the time it comes to a complete stop on the inclined track.
(D) Calculate the rate of deceleration of the car on the inclined track.
I don't get the questions, and how they should calculate..Please help explain, I get no idea...THANKS A LOT!
why not?i don't mean to do it for me or give me the answer.i just want some hints.
i'm here asking for help, not asking for blaming, why you have to being so mean?
I did pay attention in class, I just don't get the problem and need some hints. IS THAT ILLEGAL?
It is not right to post a great number of questions under various names, pretending to be other people. We don't cater to answer moochers here. Paying attention is only the start, one has to practice in order to attain proficiency.
On this one, you know the kinetic energy at the start of the hill. That Kinetic Energy will turn into gravitational potential energy at the top. Set KE equal to PE, and solve for height.
For the average speed, it will be half the original speed. For the distance, sketch the figure: you know the height, and you know the angle. For time, you know distance and average velocity.
Finally, or acceleration, you know the change in speed, and the time.
Have fun.
I apologize if my previous response came across as mean, that was not my intention. I understand that you are seeking help and I will do my best to provide you with hints to solve the given problem.
Let's break down the problem into parts and see how we can approach each question:
(A) Calculate the maximum height above the horizontal track the car will rise just as it comes to a complete stop:
To solve this, you can consider the conservation of energy. The initial kinetic energy of the car will be converted to potential energy at the highest point of the trajectory. Set the initial kinetic energy equal to the gravitational potential energy at the highest point and solve for height.
(B) Calculate the distance, measured along the inclined track, the car will travel before coming to a complete stop:
To find the distance traveled along the inclined track, you can use the concept of work and energy. The work done by the gravitational force on the car will be equal to the change in its kinetic energy. By using trigonometry, you can relate the height and distance traveled along the inclined track.
(C) Calculate the total travel time of the car on the inclined plane from the time it enters the track to the time it comes to a complete stop:
To calculate the total travel time, you can divide the distance traveled by the average velocity of the car. The average velocity can be found by taking the initial velocity (100 m/s) and final velocity (0 m/s) and dividing it by 2.
(D) Calculate the rate of deceleration of the car on the inclined track:
The rate of deceleration can be calculated using the formula for acceleration, which is the change in velocity divided by the time taken. In this case, the change in velocity will be the final velocity of 0 m/s minus the initial velocity of 100 m/s.
Remember to use appropriate equations and formulas related to energy, work, distance, time, and acceleration. Good luck!