Question

Two skaters A and B of masses 50 kg and 70 kg respectively stand facing each other 6 m apart. Then they pull on a rope stretched between them. How far has each moved when they meet –

• A. Both have moved 3 m
• B. A moves 2.5 m and B 2.5 m
• C. A moves 3.5 m and B 2.5 m
• D. A moves 2 m and B 4 m

Answer 1

Answer: (C)

A moves 3.5 m and B 2.5 m

Answer 2

50 (3 + x) = 70 (3 – x)

150 + 50 x = 210 – 70x

120 x = 60

x = 0.5

for A, Dx_A = 3 + 0.5

for B, Dx_B = 3 – 0.5