Question: The potential energy of a particle of mass 5 kg moving in the 𝑥 − 𝑦 plane is given by 𝑈 = (−7𝑥 + 24𝑦) J, 𝑥 and 𝑦 being in meter. Initially at 𝑡 = 0 the particle is at the origin (0, 0) moving with a velocity of (2.4𝐢̂+ 0.7𝐣̂)ms −1 . The magnitude of force on the particle is
(A) 25 units
(B) 24 units
(C) 7 units
(D) None of these
Answer: Option (A)
Solution:
