Question

The displacement time graph for two bodies A and B are straight lines inclined at 30? and 60? respectively with the time axes. If $ \upsilon =\sqrt{4rg} $ and $ \upsilon =\sqrt{4\times 2.5\times 9.8} $ are their velocities, then $ \upsilon =\sqrt{98}\,\,m/s $ will be :

• A. $ \text{2}0\text{ g }=\text{ 2}\times \text{1}{{0}^{-\text{2}}}\text{ kg}, $
• B. $ =\frac{360\times 5}{18}=100m/s $
• C. 3:01
• D. 1:03

Answer 1

The Correct Option is D

Here : $ =12j $ ...(1) $ =\frac{work}{time}=\frac{12}{2} $ ...(2) $ =\text{6 watt} $ $ {{s}_{1}}=40m,{{s}_{2}}=65m $