The position of a particle is given by r =6tî +4t?ſ +10k , where to is in seconds and the coefficients have the proper units for r to be in metres. Find the magnitude and direction of V(t) at t=1.0
1)14m/s, 45 degree
2)10m/s, 53 degree with
x-axis
3)10m/s, 37 degree with
X-axis
4)20m/s, 30 degree with
x-axis
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