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Assuming the gravity to be in negative z - direction, a force vec(F)=vec(V)xx vec(A) is exerted on a particle in addition to the force of gravity where vec(V) is the velocity of the particle and vec(A) is a constant vector in positive x - direction. What minimum speed a particle of mass m be projected so that it continues to move underflected with constant velocity ? |
| Answer» Solution :`|F|=v A sin theta` Here, `theta` is angle between `vec(v)` and `vec(A)` The particle moves undeflected if `vec(F)` acts be in POSITIVE Z - direction. Hence, velocity should be in negative y - direction, or `vec(V)_(MIN)=-(MG)/(A)hat(j)`. | |