It is easier to lift the same load by using three pulley system than by using two-pulley system. why give reason.
1 answer:
<h2>QUESTION:- It is easier to lift the same load by using three pulley system than by using two-pulley system.</h2><h2>ANSWER:- IN CASE OF IDEAL PULLEY SYSTEM</h2><h2>REASON:- </h2>
Logic behind is lies behind the mechanical advantage of the provided bt the Pulley system.
as if we calculate the mechanical advantage of the 2 Pulley system we will have the value 2
And if we will calculate the mechanical advantage of the 3 pulley system then we will get the value of 3
so due to extra mechanical advantage we feel it easy to move with 3 pulley system then 2 Pulley system
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Complete Question:
The elastic energy stored in your tendons can contribute up to 35 % of your energy needs when running. Sports scientists have studied the change in length of the knee extensor tendon in sprinters and nonathletes. They find (on average) that the sprinters' tendons stretch 43 mm , while nonathletes' stretch only 32 mm . The spring constant for the tendon is the same for both groups, . What is the difference in maximum stored energy between the sprinters and the nonathlethes?
Answer:
Explanation:
Sprinters' tendons stretch,
Non athletes' stretch,
Spring constant for the two groups, k = 31 N/mm = 3100 N/m
Maximum Energy stored in the sprinter,
Maximum energy stored in the non athletes,
Difference in maximum stored energy between the sprinters and the non-athlethes: