A body at rest can have :
A) Speed
B) Velocity
C) Momentum
D) Energy

Options

A. Speed
B. Velocity
C. Momentum
D. Energy

Answer

To solve the question "A body at rest can have:", we need to analyze each option provided:

### Step 1: Understand the Concept of Speed
- **Speed** is defined as the rate of motion. It measures how fast an object is moving regardless of its direction.
- Since a body at rest does not move, it cannot have any speed.

**Hint:** Remember, speed is related to motion. If there is no motion, speed is zero.

### Step 2: Understand the Concept of Velocity
- **Velocity** is similar to speed but includes direction. It is also a measure of how fast something is moving in a specific direction.
- Since a body at rest has no motion, it also cannot have any velocity.

**Hint:** Velocity requires both speed and direction. Without motion, there is no velocity.

### Step 3: Understand the Concept of Momentum
- **Momentum** is defined as the product of mass and velocity (Momentum = Mass × Velocity).
- If a body is at rest, its velocity is zero, which means its momentum will also be zero.

**Hint:** Momentum depends on both mass and velocity. If velocity is zero, momentum is also zero.

### Step 4: Understand the Concept of Energy
- **Energy** can exist in different forms. Two common types are:
- **Kinetic Energy**: Energy due to motion. Since the body is at rest, it cannot have kinetic energy.
- **Potential Energy**: Energy stored due to its position or height. A body at rest can still have potential energy if it is at a height.

**Hint:** While kinetic energy requires motion, potential energy can exist even when an object is at rest.

### Conclusion
Based on the analysis:
- A body at rest cannot have speed, velocity, or momentum.
- However, it can have energy, specifically potential energy.

Thus, the correct answer is **D) Energy**.