If there is no friction in a rollercoaster is the speed the same throughout?

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above

Give an example of a collision in real life. use the law of conservation of energy to describe the transfer of momentum. be sure and discuss the momentum before and after the collision occurs. you will need at least 3 sentences to thoroughly answer this question.