Question

solve the attachment file

Answer 1

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$\underline\bold{Mass \:of \:the\:the\: object}$=12kg.

$\underline\bold{Potential\: energy}$

E=mgh.
480 J = 12kg × 10ms ×h.

h = $\underline\bold{480J}$
120kg ms

= 4m

Answer 2

${\huge{\bold{\green{:Answer}}}}$

$\underline\bold{Mass \:of \:the\:the\: object}$=12kg.

$\underline\bold{Potential\: energy}$

E=mgh.

480 J = 12kg × 10ms ×h.

h[=${4 m}$