4) You drop a golf ball from a height of 1 m above the ground. It hits the ground and returns to a height of 0.5 m. Your friend makes the following argument: "The impulse Earth imparts to the golf ball as it falls must be larger than the impulse the ground imparts when the ball bounces because the time interval over which Earth exerts a force on the ball is much larger than the time interval over which the ground exerts a force on the ball." Draw one or more momentum bar charts and use them to explain either friend is right or wrong. Ability A4: Is able to use representations other than math/words to solve problems Needs Work Adequate All relevant representations were used correctly to solve the problem and the ways they were used are clearly explained. Inadequate Not all relevant representations were used or representations were used incorrectly to solve the problem. Ability A13: Is able to construct a momentum bar chart Needs Work Inadequate Bar chart has the momentum bars drawn correctly, but some labels are missing or the system is not correctly identified. The bar chart matches the process described with some other representation. Bar chart is either missing energy values, bars drawn do not show the conservation of momentum or are drawn in the wrong places. Bars could also be labeled incorrectly. The system is not identified. Ability 13: Is able to evaluate another person's problem solution or conceptual claim by direct comparison with their own solution or conceptual understanding Needs Work Inadequate Either no justification is given for the comparison or the comparison made is not consistent with the student's work. Adequate Bar chart is properly labeled and has momentum bars of appropriate magnitudes and direction. The system is clearly identified. Adequate Student clearly states their own solution/conceptual understanding, and methodically and accurately compares it with the other person's work. All relevant representations were used to solve the problems, but minor errors were made or details of how they were used are omitted. The student states their own solution/claim and compares it with the other person's solution/claim, but does not make any concluding judgment based on this comparison. OR the student does everything correctly, but their presentation is incomplete (i.e., skipping logical steps) your Missing Representations beyond math/words may be present but were not used to the solve of the problem. Missing No representation is constructed. Missing Students does not compare their solution or reasoning to the provided solution.

An estimated force vs. time curve for a baseball struck by a bat is shown in the figure below. Fmax :18 000 N F (N) 20 000 %3D 15 000 10 000 5 000 t (ms) 2 1 (a) From this curve, determine the impulse delivered to the ball. 13500 Your response is off by a multiple of ten. N • s (b) From this curve, determine the average force exerted on the ball. 9000 Your response is off by a multiple of ten. kN

Two balls of equal masses strike a wall. Ball 1 bounces off with equal speed in the opposite direction. Ball 2 bounces off with half of its initial speed in the opposite direction. Which of the following is true about the balls? (A) Ball 1 has three times as much impulse exerted on it as Ball 2. (B) Ball 1 has twice as much impulse exerted on it as Ball 2. (C) Ball 1 has 3/2 as much impulse exerted on it as Ball 2. (D) Ball 1 has 4/3 as much impulse exerted on it as Ball 2. (E) Ball 1 has four times as much impulse exerted on it as Ball 2.

An impulse of 10 Ns is applied to an object. If you know the force acting on the object was 20 N, what was the time interval the force occurred?

(a) If the impulse experienced during the collision is 200 Ns, use the information in the plot to calculate the peak force experienced during the collision.  (b) Calculate the average force experienced during the collision.

A hockey player passes a puck that is initially at rest. The force exerted by the tick on the puck is 1098 N [forward) and the stick is in contact with the puck for 4.8 ms. a) Determine the impulse imparted by the stick to puck. b) If the puck has a mass of 0.14 kg, calculate the speed of the puck just after it leaves the hockey stick

An object feels a force for 0.85 s. If you know the impulse on the object is 75 Ns, what was the average force applied to the object?

Julia  pass a basketball to her friend Luna by making a bounce pass.  Julia throws a 0.60 kg basketball toward the floor at a speed of 7 m/s and at an angle of 65 degrees with respect to the vertical.  If the ball rebounds with the same speed and angle towards Luna, calculate the impulse delivered to the ball by the floor.  Choose up and away from Julia as your positive direction.

A football player is preparing to punt the ball down the field. He drops the ball from rest and it falls vertically 1.0 m down ongo his foot. After he kicks it, the ball leaves the foot with a speed of 18 m/s at an angle of 51 degrees above the horizontal.   1) what is the magnitude of the impulse delivered to the ball in Kg meters per sec as he kicks it? An american football has a mass of 420 g 2) at what angle in degrees above the horizontal is the impulse delivered to the football?

Two identical cars, each traveling at 22m/s, slam into a concrete wall and come to rest. In car A the air bag does not deploy and the driver hits the steering wheel; in car B the driver contacts the deployed air bag. a.) Is the impulse delivered by the steering wheel to driver A greater than, less than, or equal to the impulse delivered by the air bag to driver B? b.) Choose the best explanation from among the following: The change in momentum of each driver is the same. The longer interaction time with the air bag delivers a greater impulse. The larger force delivered by the steering wheel delivers a greater impulse.