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Heavy, man “I shot an arrow into the air…” fallout Spaced Out 1pt 1 pt 1 pt 1pt 1 pt 2 pt 2 pt 2pt 2pt 2 pt 3 pt 3 pt 3 pt 3 pt 3 pt 4 pt 4 pt 4pt 4 pt 4pt 5pt 5 pt 5 pt 5 pt 5 pt Next stop, Earth It’s the rate at which objects are accelerated due to gravity on Earth. 1 PT 9.8 2 m/s Its what this graph is showing for a falling object. V (m/s) t (s) The object’s rate of acceleration slows to zero, meaning the object has reached terminal velocity 2 PT The speed of an object in free fall after 3 seconds. 3 PT 29.4 m/s The distance an object will free fall after 4.2 seconds. 4 PT 86.4 m. The time it takes for an object to free fall 145 m. 5 PT 5.4 s. The only force acting on an object in free fall. 1 PT Gravity (or weight). What a falling object will never reach on the Moon. 2 PT Terminal velocity It increases with speed as an object falls through the air. 3 PT Air resistance This decreases as an object falls through the air and approaches terminal velocity. 4 PT Net Force (and acceleration) Terminal velocity occurs when these two forces are balanced. 5 PT Weight (or force of gravity) and air resistance. All projectiles are under the influence of this. 1 PT gravity It’s the two dimensions of motion associated with a projectile with a curved path 2 PT Horizontal velocity and vertical acceleration. It’s the direction that a projectile is accelerating. 3 PT Vertical It’s how far a projectile travels horizontally after 4 seconds of traveling 23 m/s. The projectile travels 23 m 4 PT horizontally each second, so it is 92 m. It’s how much speed a free falling object on earth gains each second it falls. The object gains 9.8 m/s of vertical speed each second it falls. 5 PT It’s the net force of any object that is falling at its maximum falling speed 1 PT Zero net force The two factors that the air resistance of a falling object depends on. 2 PT Speed and frontal area (exposed surface area) One way that a falling object’s terminal velocity can decrease. 3 PT Increase in frontal area exposed to air. The shape of a curved projectile’s path 4 PT parabola The path of a projectile 5 PT trajectory The result of dropping a feather and a hammer on the moon or in a vacuum at the same time from the same height. 1 PT The feather and hammer both land at the same time It is also called the weight of an object 2 PT Gravitational force It’s 1/6th less on the Moon than on the Earth 3 PT Gravity or acceleration due to gravity It’s absence on the Moon allows all objects to fall the same 4 PT Air resistance It is why a larger, heavier object falls faster on the Earth than a smaller, lighter object with the same frontal area. The larger, heavier object has a greater net force) which means greater acceleration. 5 PT