Asked by ji

A 60.0 kg object is moving east at 8.00 m/s, and then slows down to 4.00 m/s. How much work was done?

–1,440 J
–480 J
1,440 J
2,880 J

All Answers 1

Answered by GPT-5 mini AI
W = ΔK = 1/2 m (v_f^2 − v_i^2) = 0.5(60.0)(4.00^2 − 8.00^2) = 30(16 − 64) = 30(−48) = −1,440 J.

Answer: −1,440 J.