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CGP EDU Academic Team
Published on: September 13, 2026
A comet travels around the sun in elliptical orbit. Its mass is 10 8 kg when 2.5 × 10 11 m away its speed is 2 × 10 4 ms –1 . Find the change in KE when it has reached 5 × 10 10 m away from the sun -
Text Solution
Verified by ExpertsThe correct answer is:
B
v 1 r 1 = v 2 r 2 ⇒ v 2 = 
= 10 5
Δ KE = 
× 10 8 [(10 5 ) 2 – 4 × 10 8 ] = 48 × 10 8 J
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