Question

Two balls are moving on a table and the component of velocities along the length and breadth are 5ms${}^{-1}$, 5 ms${}^{-1}$ for one ball and $2\sqrt{3}$ms${}^{-1}$ , 2 ms${}^{-1}$ for the other ball. The angle between the balls is

• A. 30${}^0$
• B. 60${}^0$
• C. 40${}^0$
• D. 15${}^0$

Answer 1

The correct option is D 15${}^0$

Assuming y-axis along breadth of table amd x-axis along length of the table.One is ${45}^0$ degree to x-axis and other is 30 degrees to x. Angle between them = ${45}^0$ - ${30}^0$ = ${15}^0$