The centripetal force required for a 1000 kg car travelling a 36kmph to take a turn by 90 degrees In travelling along an arc of length 628m
options:
1)250N
2)500N
3)1000N
4)125N
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Given:
Mass=1000kg
Speed=36km/hr =36×5/18=10m/s
Length of arc=L=628m
Formula for length of arc:
L=(90/180)×22/7×r
L=(1/2)×22/7×r
r=7×628×2/22
=7×628/11
=400m
Centripetal force = F= mv^2/r
=1000×10×10/400
=1000/4
=250N
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