Questions: View Policies Current Attempt in Progress As the text discusses, the conservation of linear momentum is applicable only when the system of objects is an isolated system. V of the systems listed below are isolated systems? 1. A ball is dropped from the top of a building. The system is the ball. 2. A ball is dropped from the top of a building. The system is the ball and the earth. 3. A moving billiard ball collides with a stationary billiard ball on a frictionless pool table. The system is the moving ball. 4. A car slides to a halt in an emergency. The system is the car. 5. A space probe is moving in deep space where gravitational and other forces are negligible. The system is the space probe. Only 1 and 3 are isolated systems. Only 2 and 5 are isolated systems. Only 4 and 5 are isolated systems. Only 5 is an isolated system. Only 3 and 5 are isolated systems.

Solution Steps

An isolated system is one where no external forces act on the system. Let's analyze each scenario:

1. A ball is dropped from the top of a building. The system is the ball.

   • The ball is subject to gravitational force from the Earth, so it is not isolated.

2. A ball is dropped from the top of a building. The system is the ball and the Earth.

   • The ball and Earth together can be considered an isolated system because the internal forces (gravity) are balanced within the system.

3. A moving billiard ball collides with a stationary billiard ball on a frictionless pool table. The system is the moving ball.

   • The moving ball experiences an external force during the collision, so it is not isolated.

4. A car slides to a halt in an emergency. The system is the car.

   • The car is subject to frictional forces from the road, so it is not isolated.

5. A space probe is moving in deep space where gravitational and other forces are negligible. The system is the space probe.

   • The space probe is not subject to significant external forces, so it is isolated.

From the analysis:

• System 2 (ball and Earth) is isolated.
• System 5 (space probe) is isolated.

Final Answer