Question

A cement bag weighs 5kg. To what height should it be raised to
29400J. [g=9.8]

Answer 1

Answer:

If the raising height h, Potential energy will be PE=mgh

So, h=

mg

PE

=

200×9.8

9800

=5m take as g=9.8m/s

2

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Answer 2

Step-by-step explanation:

A ball thrown up is caught by the thrower after 4 s. With what velocity was it

thrown up? (g = 10 m/s 2 )A ball thrown up is caught by the thrower after 4 s. With what velocity was it

thrown up? (g = 10 m/s 2 )