Give reasons for each of the following
Weightlifters apply some chalk powder on their hands before lifting weights.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Context**: Weightlifters need to lift heavy weights, which requires a strong grip on the lifting apparatus, usually a barbell or a rod.

2. **Identifying the Problem**: When lifting weights, the hands may slip off the rod due to insufficient friction between the hands and the surface of the rod. This can lead to accidents or ineffective lifting.

3. **Role of Friction**: Friction is the force that opposes the motion of two surfaces in contact. In this case, the friction between the weightlifter's hands and the rod is crucial for maintaining a secure grip.

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