Newton's Laws of MotionNewton's 1st Law: The Law of Inertia Newton's first law of motion stated as: An object will either remains at rest or continues to move at a constant velocity, unless acted upon by an external force Key points of Newton's 1st Law of motion:
Example in daily life phenomenon: Any object will not move even if we told them to do so, unless we put a force on it Newton's 2nd Law: The Law of Acceleration Newton's second law of motion stated as: The acceleration of an object is dependent upon two variables, the net force acting upon the object and the mass of the object Key points of Newton's 2nd Law of motion:
Example in daily life phenomenon: When we drop a plastic ball and a metal ball, the metal ball will damage the floor because the bigger the mass, the bigger the force. Also, if we push an object stronger than the other, it will move faster because the bigger the force, the bigger the acceleration Newton's 3rd Law: The Law of Action and Reaction
Newton's third law of motion stated as: When one object exerts a force on a second object, the second object will simultaneously exerts a force equal in magnitude and opposite in direction on the first object Key points of Newton's 3rd Law of motion:
Example in daily life phenomenon: If we punch a boxing dummy or punching bag, it will goes back to us with the same force we punch it, because it will have an equal reaction to the force we exert on it
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1) Explain what acceleration due to gravity is!
Acceleration due to gravity is the change of velocity on an object per second as the force of gravity pulls it. The acceleration due to gravity is 9.8 m/s2, so every second, the acceleration due to gravity of an object will increase by 9.8 m/s2 as it falls down due to gravity. 2) Explain what free fall means. What factors can affect free fall? Free fall is the state when an object falls due to gravity. During free fall, an acceleration due to gravity which is 9.8 m/s2 is applied on the object. The factor that can affect free fall is the location of an object, since some places is a little bit different in their acceleration of gravity, and also air resistance since air resistance can slow down the object's fall. 3) When an object is thrown upwards, does it accelerate or decelerate? Explain your answer! It decelerate, if we throw it up, soon it will slow down because gravity pull object back to the earth surface and it applies on all things on earth. 4) Does acceleration due to gravity act the same on all objects? Explain why/why not! Yes, even though they have different mass, they all have the same acceleration on gravity which is 9.8 m/s2, because they will hit the ground at the same time if they are dropped as the same time since mass doesn't affect the acceleration due to gravity and the only thing that is different is their velocity, because the lighter the object, the faster the velocity in order to balance the heavier object that could fall quickly. However, this applies if there is no air resistance. |
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