CBSE Class 11-science Answered
Please explain how to solve problems when an object is thrown from a top of a building/cliff/helicopter.
for example:
A helicopter on a flood relief mission flying horizontally wiht a speed u at an altitude h,has to drop a food packet for a victim standing on the ground.At what distance from the victim should the food packet be dropped?
In these kind of problems,should we use formulae of projectile motion?
Asked by Benjamin | 19 Sep, 2015, 05:51: PM
Expert Answer
The velocity of the food packet at the time of release is u and it is horizontal. The vertical velocity of the time of release is zero.
Vertical motion: Let t be the time taken by the packet to reach the victim, we get,
... (1)
Horizontal motion: Let D be the horizontal distance travelled by the packet, we get,
D=ut.
Substituting the value of t from equation (1) in D=ut, we get,
Therefore, the distance between the victim and the packet at the time of release is,
Answered by Faiza Lambe | 19 Sep, 2015, 10:38: PM
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