Direction of Angular Velocity

Q. A projectile is thrown at a speed of 20 m/s at an angle of ${53}^{\circ }$ with the horizontal. When it is at the highest point, its center of curvature is at $(g=10m/s^2)$

1. Ground
2. 1.6 m below ground
3. 2 m above ground
4. 1.2 m below ground

Q. In case of uniform circular motion which of the following physical quantity do not remain constant

1. Speed
2. Momentum
3. Kinetic energy
4. Mass

Q. A particle is moving along a circular path with uniform speed. Through what angle does its angular velocity changes when it completes half of the circular path?

1. $0^{\circ }$
2. ${45}^{\circ }$
3. ${180}^{\circ }$
4. ${360}^{\circ }$