A person brings a mass of 2 kg from P to Q. the increase in KE of the mass is 4 J and the work done by the person on the mass is – 10 J. the gravitational potential difference between Q and P is:

Q: A person brings a mass of 2 kg from P to Q. the increase in KE of the mass is 4 J and the work done by the person on the mass is – 10 J. the gravitational potential difference between Q and P is:

(a) – 3 J/kg

(b) – 7 J/kg

(c) 7 J/kg

(d) 4 J/kg

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Ans: (c)