Bonus! (I will grade this manually and assign points) One of…

Bonus! (I will grade this manually and assign points) One of the videos we watched in class was a story about a young lady whose parents forced her to undergo a lobotomy, leaving her mentally incapacitated. One of her family members became a vocal advocate for mental health care later in life. This family created a foundation that founded the Special Olympics. What is the name of the young lady, or the family name?

(a).       Three forces, F1 = 150 N, F2 = 10.0 N and F3 = 30…

(a).       Three forces, F1 = 150 N, F2 = 10.0 N and F3 = 30.0 N act on a 15 kg object. If F1 and F2 act in same direction, while F3 acts in the opposite direction, what is the              magnitude of the acceleration of the object?                                                                                          (2.5 points)      b).      To negotiate a curve of radius 38 m, the maximum force of static friction (centripetal force) that can act on a 1,350-kg car going around the curve is 8,200 N.            What speed limit should be posted for the curve so that cars can negotiate safely?                                                                                                       (3.0 points)                                                                                                                        c).         With what speed must a 75 kg object be going to have a linear momentum of 925 kg m/s?             (1.5 points)

(a).       At what depth in the ocean is the gauge pressure…

(a).       At what depth in the ocean is the gauge pressure acting on a hatch that has an area of 5.5 m2 equal to 490,000 Pa?   (Take g = 9.80 m/s2 and density of sea water            to be 1020 kg/m3)                                                                                                                    (1.5 points)       (b).         What is the force on the hatch area due to only the gauge pressure?                                                  (1.5 points) (c).         A hydraulic lift in a garage has two pistons: a small one with a cross-sectional area of 4.00 cm2 and large one with a cross-sectional area 250 cm2. If this lift is              designed to raise a 3500 kg car, what minimum force must be applied to the small piston and what is the pressure of the hydraulic lift?                     (3.0 points)

(a).        A 92 kg high jumper running 11 m/s executes a ju…

(a).        A 92 kg high jumper running 11 m/s executes a jump. (i).       What is his kinetic energy before the jump?                                                                                      (1.5 points)  (ii).     Using the law of conservation of energy or otherwise, calculate how high he can jump.                    (1.5 points) (b).        A 15 kg mass hangs on a spring causing it to stretch by 0.22 m. (i).         Calculate the spring constant.                                                                                                             (1.5 points) (ii).       Calculate the work done in stretching the spring by 0.22 m.                                                              (1.5 points)