Question

13) Rahul and his friends decided to prepare thernselves for long jump event taking place alon annual sport
day. They went to school ground and marked a line from where the long jump was to be measured. Before
starting the game, Rahul discussed with his friends that the ground is hard. So, they needed sand beyond
the marked line on which the jumping students will fall. They went to the sports teacher. The sports
teacher appreciated their idea and promised to arrange sand by the next day. Rahol and his friends decided
to postpone their practice for one day.
(a) What would have happened if the students would have started their practice of long jump?
(b) How can you explain the answer in (a) by the principles of physics?
(c) Which physics quantity is required to stop a moving body?
(d) For applying conservation of linear momentum, what is the external force required on the body?​

Answer 1

Answer:

An athlete runs before jumping to gain momentum.

 Because it helps injumping higher and longer because of inertia of motion gained due to the motion

.When the athletes Jump they already have a forward motion

 that would be greater than that of a jump made from standing in one spot.

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Answer 2

Answer:

A.What would have happened if the students would have started their practice of long jump?

Explanation:

i'm not sure