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A ball moves in the direction of the arrow labeled c in the figure. The ball is struck by a stick that briefly exerts a force on the ball in the direction of the arrow labeled e in the figure. Which arrow best describes the direction of Ap, the change in the ball's momentum? --Select--- g j zero magnitudeYou are lifting a heavy box. We'll consider this process for different choices of system and surroundings. (1) Choose the box as the system of interest. What objects in the surroundings exert signicant forces on this system? Check all that apply. T You T The Earth T The box T The floor None (2) Choose you and the box as the system of interest. What objects in the surroundings exert signicant forces on this system? Check all that apply. T The box T The floor You None T The Earth (3) Choose you, the box, and the Earth as the system of interest. What objects in the surroundings exert significant forces on this system? Check all that apply. T You T The floor T The box T The Earth T None 'Iuv The diagram shows the momentum of an object and the net force acting on it at some instant in time. After a short amount of time, which of the following statements is true about the magnitude of the momentum? " The magnitude of the momentum will increase. " The magnitude of the momentum will stay the same. ' The magnitude of the momentum will decrease. After a short amount of time, which of the following statements is true about the direction of the momentum? ' The momentum will be in a different direction that is not parallel to the original direction. ' The momentum will be in the opposite direction. ' The direction of the momentum will be the same. The diagram shows the momentum of an object and the net force acting on it at some instant in time. After a short amount of time, which of the following statements is true about the magnitude of the momentum? (You may assume that ifthere is any change in momentum in this situation, the time interval is short enough such that the magnitude of that change in momentum is small compared to the original momentum.) ' The magnitude of the momentum will increase. The magnitude of the momentum will stay the same. The magnitude of the momentum will decrease. After a short amount of time, which of the following statements is true about the direction of the momentum? ' The momentum will be in a different direction that is not parallel to the original direction, The momentum will be in the opposite direction. The direction Of the momentum Will be the same. The diagram shows the momentum of an object and the net force acting on it at some instant in time. (You may assume the force is constant.) Some measurable amount of time elapses. After this time, which of the following statements is true about the magnitude of the momentum? ' The magnitude of the momentum will increase. ' The magnitude of the momentum will decrease. ' The magnitude of the momentum will stay the same. After this short amount of time, which of the following statements is true about the direction of the momentum? ' The direction of the momentum will be the same. ' The momentum will be in a different direction that is not parallel to the original direction. ' The momentum will be in the opposite direction. force to the left? (Select all that apply.) You observe three carts moving to the left. Cart A moves to the left at nearly constant speed. Cart B moves to the left, gradually speeding up. Cart C moves to the left, gradually slowing down. Which cart or carts, if any, experience a net Cart A Cart B Cart CA hockey puck is sliding along the ice with nearly constant momentum kg - m/s when it is suddenly struck by a hockey stick with a force N that lasts for only 4 milliseconds (4x10'3) 5. What is the new momentum of the puck? 3r = Re ' m/s You were driving a car with velocity m/s. You quickly turned and braked, and your velocity became m/s. The mass of the car was 1400 kg. (a) what was the (vector) change in momentum AB during this maneuver? Pay attention to signs. AB = kg - m/s (b) What was the (vector) impulse applied to the car? (vector) impulse: N - s (c) If the maneuver took 4 seconds, what was the the average (vector) force exerted on the car? (The net force is due to the ground and the Earth; the y components of these forces cancel.) _, Fnet= N At t = 18.0 seconds an object with mass 3 kg was observed to have a velocity of m/s. At t = 18.1 seconds its velocity was m/s. What was the average (vector) net force acting on the object? A proton has mass 1.7 x 10'27 kg. what is the magnitude of the impulse required to increase its speed from 0.993c to 0.996c? N - s