| (i) It will move with a greater speed at Y. |
| (ii) The speed of the object at M is\[10\text{ m}{{\text{s}}^{-1}}\]. |
A) Only (i) is true.
B) Only (ii) is true.
C) Both (i) and (ii) are true.
D) Neither (i) nor (ii) is true.
Correct Answer: B
Solution :
The speed of the object is affected by the height from which it is released. \[mgh=\frac{1}{2}m{{v}^{2}}\] \[v=\sqrt{2gh}\,\,or\,\,v\propto \sqrt{h}\] No, heavier object will not move with a greater speed at Y. Speed of the object at M Loss in PE = KE \[mg(25-20)=\frac{1}{2}m{{v}^{2}}\therefore {{v}^{2}}=100\] Or \[v=10m{{s}^{-1}}\]
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