Q. 14.1( 14 Votes )
An athlete runs some distance before taking a long jump, because:
A. he gains energy to take him through the long distance
B. it helps to apply larger force
C. by running action and reaction forces increase.
D. by running he gives himself large inertia of motion.
An athlete runs before jumping to gain momentum because it helps in jumping 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. While running, the athlete cannot gain energy or apply larger force because initially he would be rest and while running he will lose energy.
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The inertia of an object tends to cause an object:
A. To increase its speed
B. To decrease its speed
C. To resist a change in its state of motion
D. To decelerate due to frictionLakhmir Singh & Manjit Kaur - Physics