Question

A 1659 kg car has a speed of 11.4 m/s when
it hits a tree. The tree doesn’t move and the
car comes to rest.Find the amount of work done by the car as
its front is pushed in.
Answer in units of J

Answer 1

i got fx-ma=friction

Answer 2

ah sorry thats for another problem

Answer 3

change in kinetic energy=work done
so work done is zero or another way to prove that W=force*displacement as displacement is zero so work done is zero:)

Answer 4

thats what i thought and it said i was wrong

Answer 5

no prob then ask other:)

Answer 6

i got -107801.82J for kinetic energy

Answer 7

thats the answer