A hockey player is moving northward and suddenly turns westward with the same speed to avoid an opponet. The force that acts on the player is.

Options

A. Frictional force along westward.
B. muscle force along southward.
C. frictional force along south-west.
D. muscle force along souoth-west.

Explanation

To solve the problem of the hockey player turning from north to west while maintaining the same speed, we can analyze the situation step by step.

### Step 1: Understand the Initial and Final Directions
The hockey player is initially moving northward. When he turns to move westward, he changes his direction but maintains the same speed.

**Hint:** Identify the initial and final directions of motion.

### Step 2: Analyze the Change in Momentum
Momentum is a vector quantity defined as the product of mass and velocity. The change in momentum occurs due to the change in direction.

- Initial momentum (P1) is directed north.
- Final momentum (P2) is directed west.

**Hint:** Remember that momentum depends on both speed and direction.

### Step 3: Determine the Change in Momentum
The change in momentum (ΔP) can be calculated as:
\[ \Delta P = P2 - P1 \]
This represents a vector subtraction where you find the resultant vector from the initial and final momentum vectors.

**Hint:** Visualize the vectors to understand how to subtract them.

### Step 4: Find the Direction of the Change in Momentum
To find the direction of ΔP, you can visualize the initial and final momentum vectors. The change in momentum vector will point from the initial direction (north) to the final direction (west).

This results in a vector that points diagonally between the north and west directions, which is southwest.

**Hint:** Use vector addition to visualize the resultant direction.

### Step 5: Relate the Change in Momentum to Force
According to Newton's second law, the force acting on an object is equal to the rate of change of momentum. Thus, the direction of the force will be the same as the direction of the change in momentum.

**Hint:** Recall Newton's second law: \( F = \frac{dP}{dt} \).

### Step 6: Identify the Type of Force
In this scenario, the force acting on the hockey player is primarily due to friction, which allows him to change direction while maintaining speed. The direction of this frictional force is southwest, as derived from the change in momentum.

**Hint:** Consider the forces acting on the player during the turn.

### Conclusion
The force that acts on the hockey player when he turns from north to west while maintaining the same speed is a frictional force directed southwest.

**Final Answer:** Frictional force acting in the southwest direction.