A man going up has potential energy and kinetic energy both.

Answer

To understand why a man going up has both potential energy and kinetic energy, we can break it down step by step:

### Step 1: Understanding Potential Energy
- Potential energy (PE) is the energy stored in an object due to its position or height. The formula for gravitational potential energy is:
\[ PE = mgh \]
where \( m \) is the mass of the object, \( g \) is the acceleration due to gravity (approximately \( 9.81 \, \text{m/s}^2 \)), and \( h \) is the height above the ground.

### Step 2: Understanding Kinetic Energy
- Kinetic energy (KE) is the energy of an object due to its motion. The formula for kinetic energy is:
\[ KE = \frac{1}{2} mv^2 \]
where \( m \) is the mass of the object and \( v \) is its velocity.

### Step 3: Analyzing the Situation
- When a man is going up, he is gaining height, which means his potential energy is increasing. As he ascends, the height \( h \) in the potential energy formula increases, leading to an increase in potential energy.

### Step 4: Considering Motion
- While the man is going up, he is also moving, which means he has a certain velocity. This motion gives him kinetic energy. As long as he is moving, he possesses kinetic energy.

### Step 5: The Effect of Gravity
- As the man ascends, he is working against the force of gravity. If he is moving upward, his velocity may decrease as he gets tired or if he is moving against a strong gravitational pull. This means that while his potential energy increases, his kinetic energy might decrease if his speed decreases.

### Conclusion
- Therefore, while going up, the man possesses both potential energy due to his height and kinetic energy due to his motion. The statement that "a man going up has potential energy and kinetic energy both" is true.

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