5. Lonnie pitches a baseball of mass 0.20 kg . The ball arrives at home plate with a speed of \( 40 \mathrm{~m} / \mathrm{s} \) and is batted straight back to Lonnie with a return speed of \( 60 \mathrm{~m} / \mathrm{s} \). If the bat is in contact with the ball for 0.050 s , what is the impulse experienced by the ball? a. \( 360 \mathrm{~N} \cdot \mathrm{~s} \) b. \( 20 \mathrm{~N} \cdot \mathrm{~s} \) c. \( 400 \mathrm{~N} \cdot \mathrm{~s} \)

2) ¿Qué aceleración adquiere si se le aplica el doble de fuerza que en el punto anterior? ¿Y si se le aplica el triple? Hacé los cálculos aplicando la fórmula, luego justificalo a través del enunciado de la Segunda Ley.

f Steve throws the football 50 meters in 3 seconds, what is the average speed of the football? (nearest hundredth) If it takes Ashley 3 seconds to run from the batters box to first base at an average spe of 6.5 meters per second, what is the distance she covers in that time? \( \begin{array}{l}\text { Bart ran } 5000 \text { meters from the cops and an average speed of } 8 \text { meters/second before } \\ \text { he got caught. How long did he run? }\end{array} \)

Una pesante maniglia in ottone ha una massa di \( 3,40 \mathrm{~kg} \). Quale volume in \( \mathrm{cm}^{3} \) occupa la maniglia? La densità dell'ottone è \( 8,40 \cdot 10^{3} \mathrm{~kg} / \mathrm{m}^{3} \).

1. A 0.500 g (small) mass on the end of a 1.70 m long string is pulled aside \( 20^{\circ} \) from the vertical and shoved downward (toward the bottom of its motion) with a speed of \( 2.4 \mathrm{~m} / \mathrm{s} \). (a) Is the angle on the other side greater than, less than, or the same as the angle on the initial side \( \left(20^{\circ}\right) \) ? Explain in terms of energy. (5pts) (b) Calculate the angle it goes to on the other side, neglecting air resistance. ( 10 pts )

85 Un pannello di MDF, una fibra di legno utilizzata per mobili componibili, ha spessore \( (14,0 \pm 0,2) \mathrm{mm} \) e forma rettangolare con lati \( (60,0 \pm 0,1) \mathrm{cm} \) e \( (80,0 \pm 0,1) \mathrm{cm} \); la sua massa è \( (5600 \pm 20) \mathrm{g} \). Le specifiche del prodotto in- dicano che il materiale ha densità \( 850 \mathrm{~kg} / \mathrm{m}^{3} \), con tolle- ranza dell' \( 1 \% \). Calcola la densità del pannello in base ai valori mi- surati.