Astudent in a classroom is exhibiting social loafing by a. listening intently to the teacher's lecture. b. offering to another student. c. sitting in the front row. d. not raising her hand when the teacher asks a question.

d. not raising her hand when the teacher asks a question.

Explanation:

Social loafing is having the tendency to do less effort while in a group compared to when you're alone.

Not raising your hand when teacher asks a question is such behavior, because you don't want to make it look like you're interested or working.

Answers A and B are the opposite of social loafing, since you would be paying attention and work publicly by assisting others.

Answer C doesn't have a direct relationship with social loafing, but a loafer will usually not sit in front of the class, he's sit in the back, trying to be ignored.

i think it is b hope this

ek = (m·v2) / 2

v - velocity of system after the collision

m = m1 + m2

ek = (m1 + m2) ·v2/2

ek = (200 + 250) ·2,32/2 = 450·5,29/2 = 1190,25 j