Question

A spring is compressed and used to launch item horizontal angular frew.
1) True
2) False

Answer 1

The provided statements are analyzed within the context of high school-level Physics, involving principles such as Newton's laws of motion, conservation of energy, and friction. The questions are answered based on these principles, demonstrating an understanding of motion and forces in various practical situations.

Step-by-step explanation:

The question relates to the subject of Physics, specifically topics within mechanics such as motion, forces, energy, and Newton's laws of motion. When considering the statements provided:

1. A rocket launched into space that escapes Earth's gravitational pull will indeed continue to travel in a straight line until another force acts upon it, in line with Newton's first law of motion, making the statement True.
2. The amount of force the boy must exert to push a box up a ramp cannot be determined solely by the ramp's dimensions, as it also depends on factors such as friction and the efficiency of the ramp, making the statement False.
3. For a spring with a given force constant and compression, one can calculate the potential energy stored in the spring and then use the conservation of energy principle to determine the maximum height the rock would reach when launched, which also provides insight into the velocity when it hits the ground.
4. An external force is required to set a stationary object in motion in outer space if we ignore any gravitational influences and atmospheric friction, as per Newton's first law, making the statement False.
5. As a rock is thrown into the air, its kinetic energy decreases while its potential energy increases. Conversely, as it falls, its potential energy decreases and kinetic energy increases, making the statement False.
6. Kinetic friction is typically less than static friction due to fewer contact points and interlocking once the object is in motion, which is why more force is usually needed to start moving an object than to keep it moving, making this statement True.
7. Comparing two spring-loaded launchers at different angles requires an understanding of projectile motion. The detailed analysis would involve physics equations and concepts to determine the maximum vertical height achieved depending on the launch angle and initial velocity.

The general idea behind these physics problems is understanding and applying Newton's laws of motion, the conservation of energy, and friction in the context of real-world scenarios.