A car is waiting at a red stop light . The light turns green and the car accelerates at a rate of 2.5m/s for 7.5 seconds. How fa
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Option C homie. 0.00001 C at 2 meters is 0.225 N
Answer:
(a)
(b) 0.033
Explanation:
(a)
Force F=mg where m is mass and g is acceleration due to gravity whose value is taken as
However, for this case, the maximum force is 8 times the weight of runner hence F=8mg
Assume Young's modulus for tendon is
Young's modulus is given by
and
and substituting F with 8mg we obtain
Where E is young's modulus, l is stretched length and \triangle l is change in length
Substituting m as 70 kg, g as , l as 15cm=0.15 m, E as
and A as
(b)
Strain, and the fraction of tendon’s length is the ratio of change in length to the stretched length
The fraction of tendon, f is given by
. Substituting
with 0.005m and l with 0.15m we obtain
Therefore, fraction of the tendon’s length is 0.033