34)

a)

SEEING FROM THE FIGURE

WE CAN SAY THAT ACC OF THE 4 KG BLOCK IS 2 TIMES MORE THAN THAT OF 5KG ONE

LET THE ACC OF 5 KG BLOCK IS A THEN THAT OF THE 4 KG BLOCK IS 2A

50-2T=5A (2T IS THERE SINCE THE BLOCK IS CONNECTED BY THE STRINGS)

T-40=4(2A)

T-40=8A

2T-80=16A

SOLVING IT WE GET

-30=21 A

A= -10/7= -G/7

THIS MEANS THAT THE 5KG BLOCK IS ACC UPWARDS



AND THE 4 KG DOWNWARDS

THE ACC OF 5 KG BOCK IS G/7 AND THAT OF THE 4 KG BLOCK IS 2G/7



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