Question 7 (4 points) Police cars are often equipped with bullbars, special bumper attachments used to push disabled vehicles or bump dangerous drivers off the road. A police car does (2.5x10^2) J of work in bumping a dangerous driver with its bullbar that has a spring constant of (8.40x10^4) N/m, what force was applied to the truck? Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer units Add attachments to support your work Question 8 (3 points) Determine the frequency of vibration of a mass-spring system undergoing simple harmonic motion with a mass of 0.26 kg and a spring constant of 270 N/m. Your Answer: Answer units Add attachments to support your work Question 9 (5 points) Explain the concept of damping in your own words. Give examples of a situations that the average person might experience that exhibit underdamped behaviour and overdamped behaviour