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If veca=2veci+3vecj+4veck and vecb =4vec...

If `veca=2veci+3vecj+4veck and vecb =4veci+3vecj+2veck` find the angle between `veca and vecb`.

Text Solution

Verified by Experts

`S=10T+4.9 T^2`
`ds/dt=V=10+4.9 xx 2t=10+9.8t`
initial velocity t=0,`V_ini =10m/s`
Velocity at 3sec=`10+9.8 xx 3=39` .4m/s
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