Correct Option
The correct option is (c) 2 and 3 only.
Explanation
Force is an external agent (push or pull) capable of changing the state of rest or motion of a particular body. The application of force can result in a change in speed, a change in the direction of motion, or a change in the shape of an object.
Statement-wise Analysis
- Statement 1 is Incorrect: When a goalkeeper dives or jumps to save a goal, they apply force to the moving ball. This force acts opposite to the direction of the ball's motion to bring it to a stop. Consequently, the speed of the ball decreases to zero; it does not increase.
- Statement 2 is Correct: A hockey player flicks the ball to pass it to another player or to score a goal. In this action, force is applied to the moving ball to alter its path. Thus, force is effective in changing the direction of motion of an object.
- Statement 3 is Correct: To make a tyre move faster, it must be pushed repeatedly. When force is applied in the direction of the object's motion, the magnitude of its velocity increases. Therefore, pushing the tyre in the direction of motion increases its speed.
Key Takeaway
Effects of Force: A force applied to an object can change its speed (increase or decrease), change its direction of motion, or alter its shape, depending on the magnitude and direction of the applied force relative to the object's motion.