NCERT Exemplar Questions

Unspecified year 8 questions

1. The angle between $A = \hat{i} + \hat{j}$ and $B = \hat{i} - \hat{j}$ is
2. Which one of the following statements is true?
3. Figure shows the orientation of two vectors u and v in the xy-plane. If $u = a\hat{i} + b\hat{j}$ and $v = p\hat{i} + q\hat{j}$, Which of the following is correct? [add image]
4. The component of a vector r along X-axis will have maximum value if
5. The horizontal range of a projectile fired at an angle of $15^{\circ}$ is 50 m. If it is fired with the same speed at an angle of $45^{\circ}$, its range will be
6. Consider the quantities, pressure, power, energy, impulse, gravitational potential, electrical charge, temperature, area. Out of these, the only vector quantities are:
7. In a two dimensional motion, instantaneous speed $v_{0}$ is a positive constant. Then, which of the following are necessarily true?
8. In a two dimensional motion, instantaneous speed $v_{0}$ is a positive constant. Then, which of the following are necessarily true?