The 4.2 Mg truck and 2.0 Mg car are traveling with the free- rolling velocities shown just before they collide. After the collision, the car moves with a velocity of 16 km/h to the right relative to Part A the truck. Determine the coefficient of restitution between the truck and car.(Figure 1) O AZ vec ? You have already submitted this answer. Enter a new answer. No credit lost. Try again. Submit Previous Answers Request Answer Part B Determine the loss of energy due to the collision. VO AZ 1 vec ? Figure 1 of 1 ΔΕ- kJ Submit Previous Answers Request Answer 30 km/h X Incorrect; Try Again; 5 attempts remaining 10 km/h Provide Feedback

NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Three seconds after automobile B passes through the intersection shown, automobile A passes through the same intersection. Given, the speed of automobile A is VA = 55.00 mi/h and automobile B is vg= 34.00 mi/h, respectively. Also, know that the speeds are constant for the automobiles during the encounter. N 70° S + VA vB Determine the distance between the two automobiles 2 s after A has passed through the intersection. The distance between the two automobiles 2 s after A has passed through the intersection is

The driver of a vehicle approaching a signalised intersection at a speed of 40 kmph applied brakes on seeing the signal changing from green to amber and the vehicle was brought to stop on the prescribed stop line during amber time of 4 sec. If the reaction time of driver is assumed as 1 sec. then the average friction coefficient developed is [Take g = 9.81 m/s²]

Problem 1. In deriving braking distance, we assume a constant acceleration/deceleration rate, a. In fact, AASHTO assumes constant acceleration a(t) = c (constant) in most of its design procedures. Although this is not entirely true, distances required for acceleration or deceleration can be realistic if appropriate values are chosen for the constant acceleration process. Linear acceleration a(t) = c₁ ⋅ t (t is time elapse and c₁ is jerk rate or rate of change) is a better approximation to the acceleration process. a) What is the practical stopping distance for a vehicle with initial speed 70 mph, if acceleration is described by a linear function of time using a(t) = -1.8t (t is time elapse in seconds). b) Use a constant acceleration rate to achieve the same stopping distance. What is this constant acceleration rate?

Suppose that a car traveling to the west begins to slow down as it approaches a traffic light. Which of the following statements about its acceleration is correct? O Since the car is slowing down, its acceleration must be negative. The acceleration is toward the east. O The acceleration is toward the west. O The acceleration is zero.

Braking test 2. For another test of the tires, a car made repeated stops from 60 miles per hour. The test was run on both dry and wet pavement, with results as shown in the table. (Note that actual braking distance, which takes into account the driver’s reaction time, is much longer, typically nearly 300 feet at 60 mph!)  a) Write a 95% confidence interval for the mean dry pavement stopping distance. Be sure to check the appropriate assumptions and conditions, and explain what your interval means.  b) Write a 95% confidence interval for the mean increase in stopping distance on wet pavement. Be sure to check the appropriate assumptions and conditions, and explain what your interval means.    Stopping Distance (ft)Dry Pavement---Wet Pavement    145                    211   152                   191   141                   220   143                   207   131                  198   148                   208   126                  206   140                  177   135…

A car was travelling at a speed of 50 mph (mi/hr). The driver saw a road block 80 meters ahead and stepped on the brake causing the car to decelerate uniformly at 10 m/s2. Find the distance (in m) from the roadblock to the point where the car stopped. Assume perception reaction time is 2 seconds.

Situation 1: Two automobiles A and B are approaching each other in adjacent highway lanes. At t = 0 seconds, A and B are 1 km apart, their speeds are VA = 110 kph and VB = 60 kph and they are at points P and Q respectively. Knowing that A passes point Q, 40 seconds after B was there and that B passes point P, 42 seconds after A was there. Question 6 Question 7 Question 8 Determine the time when they pass each other. Determine the speed of B when they pass each other. Determine the acceleration of A. 25.89 sec O 24,88 m/s O 0.139 m/s^2 O 20.89 sec O 25.12 m/s O -0.278 m/s^2 O 10.89 sec O 23.77 m/s O 0.34 m/s^2 15.89 sec O 22.54 m/s O 0.48 m/s^2

A motorist traveling at 55 mi / h down a grade of 5% on a highway observes a crash ahead of him ,involving an overturned truck that is completely blocking the road .If the motorist was able to stop his vehicle 30 ft from the overturned truck ,what was his distance from the truck when he first observed the crash? Assume perception-reaction time =2.5. f=0.35.

PROBLEM 1: A car travels a 10-degree inclined road at a speed of 20 ft/s. The driver then applies the break and tires skid marks were made on the pavement at a distance "s". If the coefficient of kinetic friction between the wheels of the 3500-pound car and the road is 0.5, determine the skid mark distance.