When we think about how different shapes can change the torque (which is a twist force) on an object that spins, we focus on two main things: where the mass is and how far it is from the center point where it rotates. Here are some important points to remember:

1. Shape and Mass Distribution: Different shapes can weigh the same but can spread their weight in different ways. For example, a solid disk and a solid cylinder can weigh the same, but they will act differently when it comes to torque because of where their weight is placed.

2. Lever Arm Length: The shape also affects how much leverage you get. Torque ($\tau$) can be figured out using this simple formula: $\tau = r \times F$. Here, $r$ is the distance from the center point of rotation to where you apply the force. If the lever arm is longer, you get more torque from the same force.

3. Moment of Inertia: The shape of an object changes its moment of inertia ($I$). The moment of inertia tells us how hard or easy it is for something to spin. For instance, a hollow sphere is harder to spin than a solid sphere, even if they have the same weight. This means you’ll need more torque to make the hollow sphere spin at the same speed.

In short, the shape of an object changes both how far the force can reach and how the weight is spread out. These two factors together decide how much torque the object experiences!