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

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

anonymous · Answer

i got fx-ma=friction

anonymous · Answer

ah sorry thats for another problem

anonymous · Answer

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:)

anonymous · Answer

thats what i thought and it said i was wrong

anonymous · Answer

no prob then ask other:)

anonymous · Answer

i got -107801.82J for kinetic energy

anonymous · Answer

thats the answer