Question
Question: The only force acting on a block is along x-axis is given by F =<img src="https://cdn.pureessence.te...
The only force acting on a block is along x-axis is given by F =
. When the block moves from x = – 2 m to x = 4 m, the change in kinetic energy of block is –
A
Positive
B
Negative
C
Zero
D
May be positive or negative
Answer
Negative
Explanation
Solution
As W = DK
Force is along negative x-axis and displacement is along + x-axis
\ W = negative
Hence
DK = negative