For an isolated system, the total energy of the system can a. increase b stay th

Question

For an isolated system, the total energy of the system can a. increase b stay the same c. decrease 2. A bat hits a stationary baseball which gives it a certain imputes. This impulse changes the momentum of the ball. If we ignore air drag, then he ball follows a Parabolic path and is caught by your friend who uses a baseball glove to catch it. The impulse given by the bat to the ball has the same magnitude as the impulse by the glove on the ball. If F1 = force of bat on ball and F2 = force of ball on glove, then comparing force magnitudes a. F1 > F2 b. F1

Explanation / Answer

1 - b (since system is isolated)

2 - c (law of conservation of momentum)

3 - c ( If it is rotating with uniform angular velocity, no. If its angular velocity is increasing or decreasing, necessarily yes. Hence not enough information in question)

4 - b (Since the ice that was at the South Pole is now distributed around the world, there is a change in the distribution of mass. Like an ice skater opening their arms. Since the mass is further from the axis of rotation, the rotation slows; which means the days are longer.)

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