Question

4. A work of 4900 J is done on load of mass 50 kg to lift it to a certain height. Calculate the
height through which the load is lifted.
​

Answer 1

Answer:

Since, the object is raised to certain height, the work done is equal to the potential energy stored in the body.

So, W = PE = mgh where m is the mass, g is the acceleration due to gravity and h is the height upto which the object is raised.

Here, 4900 = 50 × 9.8 × h ( g = 9.8m/s²)

\begin{gathered}h \: = \frac{4900}{50 \times 9.8} = \frac{4900}{5 \times 98} \\ \\ h = 10\end{gathered}

h=

50×9.8

4900

=

5×98

4900

h=10

Therefore, the object is raised to a height of 10m.

Answer 2

Answer:

लिंक जॉईन कर

Explanation:

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