Which of the following statements is incorrect?

Options

A. A cricketer moves his hands backwards while holding a catch.
B. A person from hing from a certain height receives more injuries when he falls on a cemented floor than when he falls on a heap of sand.
C. It is easier to push a lawn mower than to pull it.
D. Mountain roads are generally made winding upwards rather than going straight up.

Explanation

To solve the question, we need to evaluate each of the given statements and determine which one is incorrect. Let's analyze each option step by step.

### Step 1: Analyze Option A
**Statement:** A cricketer moves his hands backwards while holding a catch.

**Explanation:**
- When a cricketer catches a ball, moving the hands backward increases the time duration (Δt) over which the force is applied.
- According to the impulse-momentum theorem, impulse (J) is equal to the change in momentum, which is also equal to force (F) multiplied by the time duration (Δt).
- By increasing Δt, the force exerted on the cricketer's hands is reduced, minimizing the risk of injury.

**Conclusion:** This statement is true.

### Step 2: Analyze Option B
**Statement:** A person falling from a certain height receives more injuries when he falls on a cemented floor than when he falls on a heap of sand.

**Explanation:**
- When falling onto a cemented floor, the time duration (Δt) of the impact is very short, resulting in a high force of impact.
- Conversely, when falling onto a heap of sand, the time duration (Δt) is longer, leading to a lower force of impact.
- Therefore, the person is likely to incur more injuries when falling on cement compared to sand.

**Conclusion:** This statement is true.

### Step 3: Analyze Option C
**Statement:** It is easier to push a lawnmower than to pull it.

**Explanation:**
- When pushing a lawnmower, the normal force increases due to the vertical component of the pushing force, which increases the frictional force opposing the motion.
- When pulling, the vertical component of the pulling force reduces the normal force, thereby reducing the frictional force.
- Thus, it is easier to pull the lawnmower than to push it.

**Conclusion:** This statement is incorrect.

### Step 4: Analyze Option D
**Statement:** Mountain roads are generally made winding upwards rather than going straight up.

**Explanation:**
- Winding roads reduce the steepness of the incline, which decreases the chances of vehicles slipping while driving uphill.
- This design is safer and more practical for vehicles, especially in mountainous regions.

**Conclusion:** This statement is true.

### Final Answer
The incorrect statement is **Option C: It is easier to push a lawnmower than to pull it.**

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