Final answer:
The given statements regarding forces and motion are addressed based on the principles of physics, with explanations confirming the accuracy of three true statements and refuting three false statements.
Step-by-step explanation:
Understanding Forces and Motion
When analyzing situations involving forces and motion, it is crucial to consider the principles of physics to arrive at accurate conclusions. Given the scenarios, let’s address each statement:
- 45. False - The force exerted to push a box up a ramp depends on numerous factors including the ramp’s angle of inclination and the coefficient of friction. Simply dividing the weight by three neglects these aspects and is not an accurate way to determine the force required.
- 54. False - The normal reaction is indeed a force that opposes gravity, but it acts perpendicular to the surface, not in the direction of the force of gravity.
- 60. True - A vector can indeed be broken down into x and y components forming a right angle triangle. This is a fundamental concept in vector analysis known as vector decomposition.
- 46. True - In outer space, away from gravitational influences and atmospheric friction, Newton’s first law states that an external force is still required to set a stationary object in motion.
- 29. True - According to Newton’s first law of motion, an object in motion continues in a straight line unless acted upon by an external force. This applies to a rocket that has escaped Earth’s gravitational pull.
- 24. True - Solar sail craft propulsion is indeed possible using the particles within the solar wind. This is a method of spacecraft propulsion using radiation pressure exerted by sunlight on large mirrors.