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43 Car safety The National Transportation Safety Board indicates that a person in a car crash has a reasonable chance of survival if his or her acceleration is less than
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- In 1898, the world land speed record was set by Gaston Chasseloup-Laubat driving a car named Jeantaud. His speed was 39.24 mph (62.78 km/h), much lower than the limit on our interstate highways today. Repeat the calculations of Example 2.7 (acceleration for first 6 miles, time of timed mile, acceleration for last 6 miles) for the Jeantaud car. Compare the results of the ThrustSSC to Jeantaud.arrow_forwardWhich of the following situations would result in a greatest impact force: a. the crash is head-on between two identical cars both moving at 30mph and b. the crash is head-on into a stationary brick wall with a velocity at 30mph? Explain why.arrow_forwardEric is driving his scooter to soccer practice. his speed is 35 mph. splat! A mouth smashes against the windshield and bug "guts" are everywhere. gross! which scenario is true? A. The windshield exert a greater force on the bug and the bug exerts on the windshield b. the bug exerts a greater force on the windshield than the windshield exerts on the bug. c. the force that the windshield exerts on the bug and the force that the bug exerts on the windshield are the same magnitude.arrow_forward
- A cyclist is travelling at 21 km/h when she sees a stop sign ahead. She applies the brakes and comes to a stop in 15 m. The mass of the cyclist and the bike is 73 kg. a. Calculate the acceleration of the cyclist. b. Determine the coefficient of friction between the road and the bike tires.arrow_forwardA stuntman drives a car of mass 1125 kg east with a speed of 20 m/s. a. If the car accelerates at a rate of –2 m/s 2 , how long will it take the car to go 50 m? b. The stuntman drives the car off an 80 m cliff while going 15 m/s. How long will it take the car to land? c. How far horizontally from the cliff will the car land?arrow_forwardYou are in charge of improving the safety of a carnival ride. The ride involves a 165 kg cart travelling at 13.1 the wall. m S toward a brick wall. The cart is supposed to stop at the last second just before it hits You want the cart to come to a complete stop within a time of 1.85 s. What force is required to stop the cart in this amount of time? F = N Based on the parts you have been provided, you are able to exert a force of 3820 N on the cart. What is the maximum initial speed that the cart could have and still stop within 1.85? Vmaximum = m Sarrow_forward
- QUESTION 14 A truck collides with a motorcycle causing a large amount of damage to the motorcycle. Which of the following is true about the collision? A. The force on the motorcycle is greater than the force on the truck. В. The acceleration on the truck is the same in magnitude as the acceleration on the motorcycle. С. The displacement of the truck is the same in magnitude as the displacement of the motorcycle. The force on the truck is greater than the force on the motorcycle. D. E The force on the truck is the same in magnitude as the force on the motorcycle. E,arrow_forwardA bus driver is driving at 25 mph and has to make an emergency stop by slamming on the bus's brakes. Later, he slams on the breaks again, but this time he is driving at 50 mph. How far will the bus skid compared to the first time? A. The stopping distance stays the same. А. B. The stopping distance is tripled. В. C. The stopping distance is quadrupled. D. The mass of the bus is required. E. The stopping distance is doubled.arrow_forwardA block with a mass (m) of 74.7 kg slides along a horzontal surface. the coefficent of kinetic friction is .31. THe block has an ititial speed (v0) at 11.6m/s in the positive direction. 1) write and expression for the x component of the frictional force of the block experiences Ff in terms of the given variables and variables avaible. 2) what is the magnitude of the frictional force? 3) how for will the block travel before coming to rest.arrow_forward
- different. e. There is not enough information to draw any conclusions regarding distance and displacement. 7. If a car is travelling, north with a constant speed of 25.0 m/s, what is the net force that acts on the car? a. EF = 9.80 N b. ΣF-0 C. EF =-9.80 N d. EF = 25.O N e. We cannot draw any conclusions about the force because we do not know the mass of the car. 8. If a fly collides with a windshield of a fast-moving car, which experiences impact force with a larger magnitude? a. The fly. b. The car. C. Both experience the same force. d. Depends whether the car isla Ford or a Holden. e. None of the above. Page 13 of 16 Assessment 3 of Semester 2, 2021 PHYS0004 Fundamentals of Physics 9. Select the most true statement from the following: a. Joule (J) is a unit of work. b. Joule (J) is a unit of energy. c. Joule (J) is a unit of power.arrow_forwardO D. 42 mi/h QUESTION 14 A 20-ton truck collides with a 1500-lb car. Which of the following statements must be true? OA. The truck did not slow down during the collision, but the car did. В. O B. During the collision, the magnitude of the force on the truck is smaller than the magnitude of the force on the car. OC During the collision, the magnitude of the force on the truck is equal to the magnitude of the force on the car. O D.During the collision, the magnitude of the force on the truck is greater then the magnitude of the force on the car. QUESTION 15 che velocity of an object is zero at some point, then its acceleration must also be zero at that point. True False zve and Submit to save and submit. Click Save All Answers to save all answers. e here to searcharrow_forwardAsaparrow_forward
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning