Vocabulary
the act or process of changing position or place
Motion
A golf ball in flight demonstrates this. The ball keeps moving until air resistance and gravity slow it down.
Newton's First Law
What is Newton's 1st law of motion?
An object at rest stays at rest and an object in motion stays in motion unless acted on by an outside force
What is Newton's 2nd Law of motion?
The acceleration of an object as produced by a net force is directly proportional to magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object
What is Newton's 3rd Law?
Every action has an equal and opposite reaction.
is found by dividing the change in the velocity of the object by the change in time
Acceleration
when a club hits a ball, causing to accelerate in the direction of the hit
Newton's 2nd Law
How does inertia relate to Newton's first law?
It relates to Newton's first law because the law describes how objects with inertia behave when no net external force is acting on them
What does Newton's second law state about the relation ship between force, Mass, and acceleration?
It states that the force acting on an object is equal to the mass of the object multiplied by its acceleration. this means that the greater the mass of an object, the more force is required to accelerate it.
What does Newton's third law state about action and reaction forces?
Newton's third law states that for every action, there is an equal and opposite reaction. This means that when one object exerts a force on a second object, the second object exerts a force of equal magnitude but in opposite direction on the first object.
a measure of speed in a given direction
Velocity
the club hitting the ball is the action, and the ball flying away is the reaction
Newton's 3rd Law
How does Newton's first law explain why passengers feel a jolt when a bus suddenly accelerates?
Their bodies tend to stay at rest due to inertia. The bus moves forward, but their bodies momentarily resist this change in motion until the seat pushes them forward.
How does Newton's second law explain why it is harder to push a heavy box than a light box?
A heavier box has more mass which means it requires more force to achieve the same acceleration as the lighter box.
How does Newton's third law explain the flight of a rocket?
When a rocket launches it expels gas downwards at high speed. Accord to Newton's third law, the rocket experience an equal and opposite force that pushes I upward, allowing it to lift off the ground.
the distance an object moves per unit of time
Speed
A kid on a skateboard pushes off the ground, the more he pushes the more he accelerates
Newton's 2nd Law
How does Newton's law apply to a hockey puck sliding on ice?
A hockey puck sliding on a smooth ice surface will continue to slide in a straight line at a constant speed until it is stopped by an external force.
How does Newton's second law apply to a car accelerating from a stop?
When a car accelerates from a stop, the engine generates a force that propels the car forward.According to Newton's second law, the acceleration of the car depends on the net force produced by the engine and the mass of the car. A greater force from the engine results in greater acceleration, while a heavier car requires more force to achieve the same acceleration.
If you push against a wall, why do you not move it?
When you push against a wall you exert a force on the wall and the wall exerts an equal and opposite force back on you. Since the wall is fixed and bigger it does not move.
the tendency of an object to resist a change in motion
Inertia
When you jump off a boat onto the dock and your feet pushes off the boat and the boat pushes off your feet
Newton's 3rd Law
What causes a body to move after it has been in a condition of rest?
Force
If two objects with different masses are pushed with the same force, how will their accelerations compare?
If two objects are pushed with the same force, the object with the smaller mass will experience a greater acceleration compared to the object with larger mass.
How does Newton's third law apply when swimming?
When you push the water backward with your hands and feet he water pushes you forward allowing you to swim. The harder you push the faster you move.