Ahmad Hossain said:what is problem there. Do you know the exact answer. I may try. But it is not as complex as you think. it is basic. The cart displacement depends on applied force.
Ahmad Hossain said:time is equal both cases. so time is 2s
Ahmad Hossain said:Ok, of course, you need to know the basic physics. v=x/t...0.5=1/t...t=2s... for second case...x=vt----------v=1*2=2m
Ahmad Hossain said:you may forget, you use the same track...so common sense.
Ahmad Hossain said:that why i advice you read the book Tipler physics...it is very high level book...so you can find the answer. In forum i cannot explain all things in a short time ...i am also busy,,,,,,,,,I just give you the right answer...your conception you need to clear it...I cannot do it in a short time...may be you do not have deep knowledge in physics.so it can happen.
Why do you think the answer is 2 meters?Scholar1 said:0.5^2=0.25
1^2=1
1/0.25=4m
The answer is 2 meters
Doc Al said:Why do you think the answer is 2 meters?
Not necessarily. The answer key can be wrong.Scholar1 said:The answer key says the answer is 2m. Therefore I clearly am doing something wrong and need help.
Why in the world would you think the time was the same? And where did you get 2 s?Ahmad Hossain said:time is equal both cases. so time is 2s
Yes.Scholar1 said:So you are saying I am correct?
Doc Al said:Not necessarily. The answer key can be wrong.
The key is: what is the same between the two trails? The assumption must be that the retarding force and thus the acceleration is the same.
Which leads to your answer of 4 m. The faster car has 4 times the energy and thus 4 times the work must be done to stop it and thus 4 times the distance.
Wonderful. Ahmad Hossain just trolled me for an hour and insulted me for no reason.Doc Al said:Yes.
Scholar1 said:I think it is best you let someone else help on this one. You are only telling me I do not understand physics instead of solving the question correctly. I already provided you the answer and then you just told me my answer again.
no, 4m is totally incorrect...because common senseDoc Al said:Yes.
Please state your reasoning and calculation. "Common sense" is not a physics principle.Ahmad Hossain said:no, 4m is totally incorrect...because common sense
Ahmad Hossain said:no, 4m is totally incorrect...because common sense
you told me why 4m...Doc Al said:Please state your reasoning and calculation. "Common sense" is not a physics principle.
We already know that you are wrong. Unless you show us your calculations to prove otherwise.Ahmad Hossain said:just you should go to you professor ask that I am wrong or he is wrong...I know something but it is not mean I know false.
I did and so did Scholar1. Show us where the mistake lies.Ahmad Hossain said:you told me why 4m...
This calculation is incorrect. The speed is not constant. (Hint: Find the average speed.)Ahmad Hossain said:first find out its time when it moves 1m...So v=X/t...0.5=1/t and t=2s...
This is wrong. (For multiple reasons, including the same error made above.) You cannot just assume the the same time. Use physics!Ahmad Hossain said:Now its initial velocity 1m/s and inital velocity can differ and it depends on your applied force...so you can travel same distance in a same time and initial velocity can differ. final answer x=vt...x=1*2 =2m
Scholar1 said:I think it is best you let someone else help on this one. You are only telling me I do not understand physics instead of solving the question correctly. I already provided you the answer and then you just told me my answer again.
Doc Al said:Not necessarily. The answer key can be wrong.
The key is: what is the same between the two trails? The assumption must be that the retarding force and thus the acceleration is the same.
Which leads to your answer of 4 m. The faster car has 4 times the energy and thus 4 times the work must be done to stop it and thus 4 times the distance.
what you do not understand.billy_joule said:EDIT: Sorry, posted my mistake. Can't figure out how to delete it!
I use same time because of his question and you can change initial velocity because you applied force is different.the box has same mass and the track is same...it is better you do the experiment. I am sure 100%...Doc Al said:This calculation is incorrect. The speed is not constant. (Hint: Find the average speed.)This is wrong. (For multiple reasons, including the same error made above.) You cannot just assume the the same time. Use physics!
What do you mean by "applied force"? The force that gives the car its initial speed? That is irrelevant. What matters is the force from the track, which is the same.Ahmad Hossain said:I use same time because of his question and you can change initial velocity because you applied force is different.the box has same mass and the track is same...
But still wrong.Ahmad Hossain said:I am sure 100%...
Kinematics is the study of motion, including the position, velocity, and acceleration of objects without considering the forces that cause the motion.
An Energy Problem in Kinematics involves calculating the energy of an object or system based on its motion and position. This can include potential energy, kinetic energy, and work done by external forces.
To solve Kinematics/Energy Problems, you need to first identify the given variables, such as initial and final positions, velocities, and accelerations. Then, you can use equations of motion and energy conservation principles to solve for the unknown variables.
The units of measurement used in Kinematics/Energy Problems are typically meters (m) for distance, meters per second (m/s) for velocity, meters per second squared (m/s^2) for acceleration, and joules (J) for energy.
Kinematics/Energy is used in various real-life applications, such as designing roller coasters, analyzing the motion of vehicles, and predicting the trajectory of projectiles. It is also used in sports, such as calculating the speed and acceleration of athletes, and in engineering to optimize the efficiency of machines and structures.