which object will have higher inertia a rock of 20kg or a hollow ball of 22kg

To determine which object will have higher inertia, we need to understand what inertia is. Inertia is the resistance of an object to changes in its state of motion or rest. The inertia of an object depends on its mass, with greater mass generally resulting in higher inertia.

In this case, we have a rock with a mass of 20 kg and a hollow ball with a mass of 22 kg. Comparing the two masses, we can conclude that the hollow ball has a higher mass than the rock. Therefore, the hollow ball will have higher inertia.

To calculate inertia, you can use the equation:

Inertia = Mass × Velocity

However, please note that in this case, since we are only comparing the masses of the objects, we do not need to consider velocity.