3. Alfred whizzes around the ice-skating rink and suddenly sees his small brother Aldrich at rest directly in his path. Rather than knock him over, he picks Aldrich up and continues in motion without stopping. Consider both Alfred and Aldrich as parts of one system, and there are no outside forces acting on it. Answer the following: a. Does Alfred speed increase or decrease? b. Does Aldrich speed increase or decrease? c. What is the total mass of the boys? d. What is the total momentum of the boys? e. What is the new speed of both boys after collision? Mass (kg.) Velocity (m/s) Momentum Alfred 180 kg. m/s 0 kg. m/s 180 kg. m/s 60 3. Aldrich 35 Total Momentum
Gravitational force
In nature, every object is attracted by every other object. This phenomenon is called gravity. The force associated with gravity is called gravitational force. The gravitational force is the weakest force that exists in nature. The gravitational force is always attractive.
Acceleration Due to Gravity
In fundamental physics, gravity or gravitational force is the universal attractive force acting between all the matters that exist or exhibit. It is the weakest known force. Therefore no internal changes in an object occurs due to this force. On the other hand, it has control over the trajectories of bodies in the solar system and in the universe due to its vast scope and universal action. The free fall of objects on Earth and the motions of celestial bodies, according to Newton, are both determined by the same force. It was Newton who put forward that the moon is held by a strong attractive force exerted by the Earth which makes it revolve in a straight line. He was sure that this force is similar to the downward force which Earth exerts on all the objects on it.
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