CTF Photo Project

The light hanging from the ceiling is experiencing two forces. The forces are gravity and tension. Gravity is pulling the light downward with 9.8 m/s^2. Without tension the light would fall to the ground and crash. However, the tension force of the rope is acting on the light with the same quantity force as the force of gravity has.

The shiny coating on the hockey stick is a sticky substance that helps you grip the hockey stick better. Many sticks have this in order for players to not lose grip while playing. The coefficient of friction on the stick is now greater than if it were to not have the sticky coating. This is similar to football gloves. With a greater coefficient of friction, it is easier to catch a ball rather than using bare hands.

The picture of the dumbbells relates to Newton's law of inertia. The law of inertia states that objects at rest want to stay at rest and objects in motion want to stay in motion. In this picture there is a 35 pound dumbbell and a 12 pound dumbbell. Also, with inertia, objects with greater mass tend to have more inertia because they are harder to move. Because of inertia, the 35 pound dumbbell will be much harder to move than the 12 pound dumbbell.

The punching bag, although not in motion in the picture, relates to momentum. Momentum is how difficult it is to stop an object. It is easier to move the punching bag when it is still rather then when it is swinging towards you. The reason is because it has a greater momentum. When it is still, the only factor acting on the bag is mass, the velocity is 0m/s. However, when it is coming towards you the velocity is increased while the mass stays the same. Because momentum is increased the bag is more difficult to stop.

My last picture is of a hockey puck on a sliding board. A sliding board is a tool hockey players use to at home to have the feel of ice. This relates to physics because the coefficient of friction is very low making it slippery. In order to have the same feel you need a surface that also has a very low coefficient of friction. Concrete is not a very good substitute since its coefficient of friction is much larger than ice. The sliding board is a good alternative to ice and allows many hockey players to practice at home as if they are on ice.