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# Who said that to keep the object moving in horizontal motion a constant amount of force is needed?

## Who said that to keep the object moving in horizontal motion a constant amount of force is needed?

Before Galileo it had been thought that all horizontal motion required a direct cause, but Galileo deduced from his experiments that a body in motion would remain in motion unless a force (such as friction) caused it to come to rest. This law is also the first of Isaac Newton’s three laws of motion.

Why is Newton’s first law wrong?

There is no any external force affected to the system. Only an interial force while the collision. So the momentum should be constant according to newton’s first law.

Who said that force is not required to keep an object at rest or in uniform motion?

Newton’s first law of motion states that a body at rest remains at rest, or, if in motion, remains in motion at a constant velocity unless acted on by a net external force. This is also known as the law of inertia. Inertia is the tendency of an object to remain at rest or remain in motion.

### How Newton’s laws are relevant today?

Newton’s law are very important because they tie into almost everything we see in everyday life. These laws tell us exactly how things move or sit still, like why you don’t float out of bed or fall through the floor of your house. So thank Newton’s law of action and reaction every time you drive somewhere!

What was Newtons first law?

Newton’s first law: the law of inertia Newton’s first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force. This postulate is known as the law of inertia.

What are the forces that cause an object to move?

Explain the difference in mass and weight. Section 12.1 – Forces A force is a push or pull that acts on an object. A force can cause a resting object to move, or can accelerate a moving object by changing the object’s speed or direction. Measuring Force

#### When does an unbalanced force cause an object to accelerate?

An unbalanced force is a force that results when the net force acting on an object is not equal to zero. When an unbalanced force acts on an object, the object accelerates. The net force equals the size of the larger force minus the size of the smaller force. Friction

What was the purpose of Newtons first law of motion?

Section 12.2 – Newton’s First and Second Laws of Motion Aristotle incorrectly proposed that force is required to keep an object moving at constant speed. Galileo Galileo concluded that moving objects not subjected to friction or any other force would continue to move indefinitely. Newton’s First Law of Motion

How are force and motion measured in newtons?

Force is measured in newtons (N). One newton is the force that causes a 1kg mass to accelerate a rate of 1m/s2. 1N = 1kg.m/s2 Representing Force You can use an arrow to represent force. The length represents the magnitude and the arrow head represents the direction. Force is a vector. Combining Forces Forces combine by vector addition.