Chapter 3. HYDROSTATICS 3. An object with a weight of 500 N, weighs 450 N when suspended in water. Determine the
relative density of this object.
4. The density of ice is 920 kg m-3 while that of water is 1025 kg. m. What fraction of an
iceberg is submerged?​

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.