A pendulum with the concentrated mass “m” is suspended vertically inside a stationary railroad freight car by means of a rigid weightless connecting rod. If the connecting rod is pivoted where it attaches to the boxcar, compute the angle of that the rod makes with the vertical as a result of constant horizontal acceleration of 2 m/s.

If a rock is thrown vertically in the air then what will be the acceleration of the rock at the top of its path?

Identify two true statements about projectiles among the following

1. The horizontal component of velocity always remains constant during projectile

2. The vertical component of velocity remains constant during projectile

3. The vertical component of velocity changes due to the downward gravity

4. The kinetic energy becomes zero at maximum height

A uniform rod is rotating on a horizontal plane about a vertical axis through one end with a constant angular velocity ω0. Due to internal shear forces, the rod breaks at the mid-point of its length, and the part with the fixed axis has an angular velocity 1.5ω0 in the same sense. Determine the angular velocity of the other half.