Questions
A particle is moving in the x-y plane. At certain instant of time, the components of its velocity and acceleration are as follows: , , and . The rate of change of speed at this moment is
detailed solution
Correct option is D
Speed, v=vx2+vy2Rate of change of speed,dvdt=2vxdvxdt+2vydvydt2vx2+vy2=vxax+vyayvx2+vy2=(3×2)+(4×1)(3)2+(4)2=2m/s2Similar Questions
A block of mass kg rests on a horizontal frictionless xy-plane. What would be the acceleration of the block if it is subjected to two forces as shown in figure?
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