A block of mass m sits rest on afriction less table in a moving car with speed V_(c) a long a straight horizontal track (As shwon in fig). A person riding in the car pushes on the block with a net horizontal force F for a time t in the direction of the car's motion. Which of the following are correct

A block of mass m sits rest on afriction less table in a moving car wi

1.	A block of mass m sits rest on afriction less table in a moving car with speed V_(c) a long a straight horizontal track (As shwon in fig). A person riding in the car pushes on the block with a net horizontal force F for a time t in the direction of the car's motion. Which of the following are correct
Answer» K.E. of the BLOCK change, according to the person in car `1/2(F^(2)t^(2))/m` K.E of the block change, according to the person in car `1/2mF^(2)t^(2)` K.E. of the block change, according to the person at outside the car `1/2m(V_(c)+(FT)/m)^(2)` K.E. of the block change, according to the person at outside the car `1/2m(V_(c)+(Ft)/m)^(2)+(mV_(c)^(2))/2` Answer :A::D