Question 9 Answer saved Marked out of 7.00 Flag question This is a Written Response question. Please show all of your work. (Equations, substitutions, calculation Time left 2:03:00 either enter your answers in the space provided, or take a picture of it with your phone (speak to your teacher about this first) and attach the file in the file submission area provided for you. Several Canadian companies are redesigning and testing bulletproof vests. One company does a test that involves firing a target rifle at a crash test dummy wearing a vest. Dummy Regular bullet mBullet 8.00 g "Bullet = 650 m/s Vest The company is testing the vests with both regular bullets and armour-piercing bullets. The armour-piercing bullet travels 1.20 times faster and has 1.20 times the mass of the regular bullet shown above. a. How many times more kinetic energy does the armour-piercing bullet have than the regular bullet? (1 mark) b. How much energy is released by the explosion of the gunpowder if the transfer of energy from the explosion to the regular bullet is 90.0% efficient? (1 mark) c. The regular bullet is in the rifle barrel for 1.42 x 10-3 s. What is the average force exerted on the regular bullet by the expanding gases? (2 marks) A second test performed by the company has the regular bullet strike the vest at a glancing angle. The mass of the vest and the dummy is 56.0 kg. The bullet-vest collision is inelastic. VBullet = 98.0 m/s Vest mBullet = 8.00 g Path of bullet 120 Ballet 650 m/s Dummy d. Determine the resultant speed of the vest and the dummy following the glancing collision shown above. (3 marks)