physic
posted by Chan .
please help, I really appriciate you help alot.
Question:A 0.34 kg particle has a speed of 2.0 m/s at point A and kinetic energy of 7.5 J at point B.
(a) What is its kinetic energy at A?
___ J
(b) What is its speed at point B?
____ m/s
(c) What is the total work done on the particle as it moves from A to B?
____J

a) KE=1/2 mv^2
b) v=sqrt(2ke/m)
c) work = keatB  keatA