1-Several objects appear below. Some are in equilibrium (center of mass is above the base) and some are not. Indicate whether the object indicated as the system should be considered a point particle or an extended, rigid body in order to facilitate how the object will behave over time. Explain your reasoning.(a) your friend stands in front of you and the tennis shoes he is wearing have a high coefficient of friction, you give him a sharp push at shoulder level (your friend is the system)(b) a bowling ball is dropped to the ground from a height of 2 m (the ball is the system)(c) a truck drives over a bridge which is supported at each end by large concrete columns (the bridge is the system)(d) a bowling rolls down a ramp (the ball is the system)Please explain your answers so I can understand and learn!

Worksheet 3 1-Several objects appear below. Some are in equilibrium (center of mass is above the base) and some are not. Indicate whether the object indicated as the system should be considered a point particle or an extended, rigid body in order to facilitate how the object will behave over time. Explain your reasoning. (a) your friend stands in front of you and (b) a bowling ball is dropped to the the tennis shoes he is wearing have ground from a height of 2 m a high coefficient of friction, you give (the ball is the system) him a sharp push at shoulder level (your friend is the system) (c) a truck drives over a bridge which is (d) a bowling rolls down a ramp supported at each end by large concrete (the ball is the system) columns (the bridge is the system)