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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?
one year ago

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
one year ago
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### Course Features

• 110 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions