In each of the following cases identify all obijects in the surroundings that ex

Question

In each of the following cases identify all obijects in the surroundings that exert forces on the system a) You hitla baseball with a bat. Choose the baseball as the system. At the instant of contact with the bat, what objects should be included in the surroundings (what objects exert forces on the bail)? ground O baseball air O hands Q bat gravity O Earth (b) You are playing with a yo-yo. Choose the yo-yo (not including the string) as the system. As the yo-yo moves downward, you pull up on the string. At that moment, what objects should be incduded in the surroundings (what objects exert forces on the yo-yo)? Earth a string hand a gravity

Explanation / Answer

In the question, it is asking about the objects that exert forces on a given system.

a) Bat: contact force

Earth: gravitational force

Air: air drag force

b) Earth: gravitational force

String: tension force

Air: air drag force

c) Air: air drag force

Vine: tension force

Earth: gravitational force

d) Earth: gravitational force

Air: air drag force

Ground: friction force

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