Which of the following scientists gave the idea of the existance of gravitational force ?

Options

A. Einstein
B. James Watt
C. Faraday
D. Newton

Answer

To solve the question of which scientist gave the idea of the existence of gravitational force, we can follow these steps:

### Step 1: Identify the scientists listed in the question.
The scientists mentioned are:
- Einstein
- James Watt
- Faraday
- Newton

### Step 2: Recall the contributions of each scientist.
- **Einstein**: Known for his theories on relativity and the photoelectric effect, but not for the concept of gravitational force.
- **James Watt**: Famous for his work on the steam engine, not related to gravitational force.
- **Faraday**: Known for his work in electromagnetism, not for gravitational force.
- **Newton**: Credited with formulating the law of universal gravitation, which describes the gravitational force.

### Step 3: Determine who discovered the concept of gravitational force.
From the contributions listed, it is clear that **Newton** is the scientist who formulated the concept of gravitational force. The story of the apple falling from the tree illustrates how he came to think about gravity.

### Step 4: Conclude the answer.
The correct answer is **Newton**.

### Final Answer:
The scientist who gave the idea of the existence of gravitational force is **Newton**.

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