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Grade: 12th pass
        
Starting a race , a 68.2 kg sprinter runs the first 7.04 m in 1.60 sec,starting from the rest and acceleration uniformly.
(A)what is the sprinter speed at the end of the 1.60s?
(B)what is the sprinter kinetic energy?
(C)what average power does the sprinter generate during 1.60 s interval?
8 months ago

Answers : (1)

akshay
13 Points
							
(A)
  s=0.5 a t^2
 7.04=0.5 a 1.6^2
 a=5.5
 
v=at
 
v=5.5*1.6
.
v=8.8 m/s
 
 
(B)
    K.E=0.5mv^2
   K.E=0.5*68.2*(5.5*t)^2
   K.E=11346.775 * t^2 J
          at any time t
 
(C)
  P=m*a*s/t
 P=68.2*5.5*7.04/1.6
P=1650.44 J/s
8 months ago
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Course Features

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  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions


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