Question

A particle at (3,4,3) moves with 10m/s to reach on x axis in minimum time. Write down it's velocity in vector form

Answer 1

The Position of the Particles in Vector Form = $3\hat{i} , 4\hat{j} , 3\hat{k}$

When the Particles will move and reaches the x -axis then its position will be,

$3\hat{i} , 0\hat{j} , 0\hat{k}$

∴ Displacement covered by man = $3\hat{i} , 4\hat{j} , 3\hat{k}$ - $3\hat{i} , 0\hat{j} , 0\hat{k}$

= $0\hat{i} , 4\hat{j} , 3\hat{k}$

∴ Magnitude of Displacement = $\sqrt{(4)^2 + (3)^2}$

= 5 m.

Now, Time = 5/10 = 0.5 seconds.

Hope it helps.

Answer 2

Answer:-8j - 6k

Explanation: