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Is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects. When the interaction  ceases, the two objects no longer experience the force. Forces only exist as a result of an interaction. For example, the direction of the force  of gravity is downwards towards the center of the Earth. Link

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speed of something is the rate at which it moves or travels. For example, speed of 15 meters per second. Objects in motion often have variations in speed (a car might travel along a street at 50 km/h, slow to 0 km/h, and then reach 30 km/h). Link

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Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity. For example, For example, When you are in a car that is speeding up or braking the force you feel is related to this acceleration. Link

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The action or process of moving or of changing place or position; movement. For example, absolute motion is the translation of a body from one absolute place to another; relative motion the translation from one relative place to another.  Link

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In either situation motion is when an object changes position compared to a reference point. Not all reference points have to be standing still. For example, of a reference point that is moving is when you look out the window of a car and notice that you are moving faster than the car next to you. Link

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Balance forces are two forces acting in opposite directions on an object, and equal in size. Anytime there is a balanced force on an abject, the object stays still or continues moving continues to move at the same speed and in the same direction. For example, this log floating on a pool of water. It is floating because the weight of the log is balanced by the upthrust from the water. If more weight is tied to the log, the force pulling it down may be more and will cause it to sink. Link

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Boats and boating--Equipment and supplies

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Friction is the resistance to motion of one object moving relative to another. It is not a fundamental force, like gravity or electromagnetism. Instead, scientists believe it is the result of the electromagnetic attraction between charged particles in two touching surfaces. For example, rubbing both hands together to create heat. Link

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Kinetic friction, also known as sliding friction or moving friction, is the amount of retarding force between two objects that are moving relative to each other. For example,  A person sliding down a slide  is an example of sliding friction. Link

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Static Friction is the friction that exists between a stationary object and the surface on which it's resting. For example, have you ever noticed that it's harder to get a shopping cart moving than it is to keep it moving? If you try to push your couch across the room, the first push is the hardest part.  Link

Static Friction is when is not moving with friction

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Average speed is the total distance traveled by the object divided by the elapsed time to cover that distance. It's a scalar quantity which means it is defined only by magnitude. For example, we might say that a car has an average speed of 25 miles per hour. Its average velocity might be 25 miles per hour due east. Average speed can be viewed as the rate of change in distance with respect to time. Link

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Net Force is the sum of all the forces acting on an object. For example, when you kick a soccer ball, the ball takes off and moves through the air. At that moment, there is a net force acting on the ball. When the ball starts to come back to the ground and eventually stops, there is a net force acting on the ball as well. Link