Question

1. which of newtons laws is also know as the law of inertia? *

2 points
newtons first law of motion
newtons second law of motion
newtons third law of motion
law of conservation of energy

1. if we know that an object in motion stays in motion, why is it a ball kicked across a field eventually stops? * 2 points

gravity
inertia
newtons second law of motion
friction

Explanation:

Question 8

Newton's first law of motion states that an object at rest remains at rest, and an object in motion remains in motion with a constant velocity unless acted upon by a net external force. This law is also known as the Law of Inertia. The second law is about force, mass, and acceleration ($F = ma$), the third law is about action - reaction pairs, and the law of conservation of energy is not a Newton's law of motion.

An object in motion should stay in motion according to inertia (Newton's first law), but a ball kicked across a field stops because of the force of friction acting between the ball and the ground (and also air friction). Gravity is a force that acts vertically, inertia is the tendency to stay in motion, and Newton's second law is about the relationship between force, mass, and acceleration, not the reason for the ball stopping.

Answer:

A. Newton's first law of motion

Question 9