Physics

Problem

A block experiences a net work of

-40\,\text{J}

while it is in motion. Which statement best describes how its kinetic energy changes? a) Its kinetic energy remains unchanged. b) Its kinetic energy increases by

40\,\text{J}

. c) Its kinetic energy decreases by

40\,\text{J}

. d) Its kinetic energy decreases by

20\,\text{J}

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