1. DETAILS MY NOTES ASK YOUR TEACHER A driver noticed that there is a hazard on the road. She slams on brakes to stop the car. She had two options while she is going to stop: either to hit a haystack or to hit a cement wall. She was driving initially with 60.0 miles/h, and finally she will stop the car. Answer all the questions regarding this scenario: The change is the car's momentum is greater: 0 I can determine. More information is needed 0 when she hits the haystack Q It is the same in both cases 0 When she hits the cement wall A driver noticed that there is a hazard on the road. She slams on brakes to stop the car. She had two options while she is going to stop: either to hit a haystack or to hit a cement wall. She was driving initially with 60.0 miles/h, and finally she will stop the car. Answer all the questions regarding this scenario: The change is the car's velocity is greater: 0 When she hits the cement wall Q It is the same in both cases O I can determine. More information is needed O when she hits the haystack A driver noticed that there is a hazard on the road. She slams on brakes to stop the car. She had two options while she is going to stop: either to hit a haystack or to hit a cement wall. She was driving initially with 60.0 miles/h, and finally she will stop the car. Answer all the questions regarding this scenario: The Impulse that acts on the car is greater: C) When she hits the cement wall O I can determine. More information is needed 0 when she hits the hystack C) It is the same in both cases A driver noticed that there is a hazard on the road. She slams on brakes to stop the car. She had two options while she is going to stop: either to hit a haystack or to hit a cement wall. She was driving initially with 60.0 miles/h, and finally she will stop the car. Answer all the questions regarding this scenario: The Force that acts on the car is greater: Q When she hits the cement wall O when she hits the haystack O I can't determine. More information is needed Q It is the same in both cases A driver noticed that there is a hazard on the road. She slams on brakes to stop the car. She had two options while she is going to stop: either to hit a haystack or to hit a cement wall. She was driving initially with 60.0 miles/h, and finally she will stop the car. Answer all the questions regarding this scenario: The reason that you did choose your answer in QlD is: O The impulse is greater in my choice O The duration of the collision is shorter O The change in momentum is greater in my choice. O The duration of the collision is longer A bug hits your windshield While driving on the 405-freeway maintaining 65.0 miles/h speed . Which object receives more force during this collision? O The Bug 0 Both objects receive the same force 0 The windshield 7. DETAILS MY NOTES ASK YOUR TEACHER A bug hits your windshield While driving on the 405-freeway maintaining 65.0 miles/h speed . The bug will be hurt more because 0 Not enough information provided. Q It has a small mass , then more acceleration C) It will receive more force enough to crush it. As shown in the figure below, a skateboarder starts at point A on the ramp and rises to point B, a maximum height of h = 2.65 m above the top of the ramp. If the amount of work done against friction is insignificant, determine his initial speed (in m/s) at point A. :m/s A delivery truck from the postal service is traveling with constant velocity up an interstate entrance ramp with a 7.S slope. A 60 kg box sits on the oor of the truck and as a result of static friction, it does not slide. (a) During an interval in which the truck travels 355 m up the ramp entrance, what is the net work done (in J) on the box? H J (b) What is the work clone (in J) on the box by the force of gravity? J U (c) What is the work done (in J) on the box by the normal force? J H (d) What is the work done (in J) on the box by the force of friction? J U 10. DETAILS OSCOLPHYS2016 7.6.WA.065. MY NOTES ASK YOUR TEACHER As shown in the figure below, a 2.25 kg block is released from rest on a ramp of height h. rough patch 15.0 cm When the block is released, it slides without friction to the bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch of width 15.0 cm that has a coefficient of kinetic friction uk = 0.690. Find h (in m) such that the block's speed after crossing the rough patch is 3.70 m/s. mA battleship that is 7.00 x 107 kg and is originally at rest fires a 1200-kg artillery shell horizontally with a velocity of 450 m/s. (a) If the shell is fired straight aft (toward the rear of the ship), there will be negligible friction opposing the ship's recoil. Calculate its recoil velocity in meters per second. I:lm/s (b) Calculate the increase in internal kinetic energy in joules (that is, for the ship and the shell). This energy is less than the energy released by the gun powder significant heat transfer occurs. |:lJ 12. DETAILS MY NOTES ASK YOUR TEACHER Mass m1 = 0.200 kg moves at a velocity of 5.20 m/s collides with mass 171;, = 0.100 kg over. frictionless surface. The two masses stick together and move over a rough surface (,uk = 0.300 for 0.750 m. The two masses have enough energy to move over the inclined plane (6 = 30.0) f or a distance of 10.0 cm and compresses the spring a maximum distance d. a. Calculate the maximum compression d if the spring constant k = 12.5 g. b. In the solution indicate the concept that you have used in solving the problem. For example : conservation of energy or conservation of momentuml