JEE Main 2026 Physics question

In a perfectly inelastic collision, two spheres made of the same material with masses 15 kg and 25 kg, moving in opposite directions with speeds of 10 m/s and 30 m/s, respectively, strike each other and stick together. The rise in temperature (in C), if all the heat produced during the collision is retained by these spheres, is :(specific heat of sphere material cal/kg.C and 1 cal = 4.2 J)

• (1)1.75
• (2)1.44Correct
• (3)1.15
• (4)1.95