there is a question in kaplan that says a box is initially at rest is pushed by a person at an angle with a force of F until it reaches a speed of v and has kinetic friction mu. which of the following relationships is true.
the answer is the work done by the person is greater in magnitude than the work done by the friction force and this makes sense since it is moving
however i dont understand why it cant be this answer
the KE gained by the box is greater than the energy dissipated by friction.
can someone please explain this
the kaplan instructor tried to explain it to me not sure if it is late or i dont understand but she said
Work net= work person- work friction = KE the work of friction can be higher than the work of person so that can disprove that answer-if this were true can the book still move??
thanks for the help in advance
-chris
the answer is the work done by the person is greater in magnitude than the work done by the friction force and this makes sense since it is moving
however i dont understand why it cant be this answer
the KE gained by the box is greater than the energy dissipated by friction.
can someone please explain this
the kaplan instructor tried to explain it to me not sure if it is late or i dont understand but she said
Work net= work person- work friction = KE the work of friction can be higher than the work of person so that can disprove that answer-if this were true can the book still move??
thanks for the help in advance
-chris