A truck of mass 16,718 kg drives down the motorway at 100.9 km/hr driving towards a large metal container in the middle of the lane. The truck manages to slow down to 59.4 km/hr before hitting the box, the impact with which brings the truck to a complete stop. If this impact causes the box to move off with a velocity of 43.3 km/hr, what is the mass of the metal container? ( consider the collision to be perfectly elastic and give your answer in Sl units

Tests reveal that average drivers take about 0.75 s before they can react to asituation to avoid a collision. It takes about 3 s for a driver having 0.1% alcohol in their system todo the same. If such drivers are traveling on a straight road at 30 mph (44 ft/s) and their cars canaccelerate at -2 ft/s 2 (i.e., decelerate at 2 ft/s 2 ), determine the shortest stopping distance d for eachfrom the moment they see pedestrians

A driver on a level two-lane highway observes a truck completely blocking the highway. The driver was able to stop her vehicle only 10 ft from the truck. If the driver was driving at 70 mi/h, how far was she from the truck when she first observed it (assume perception-reaction time is 2.0 seconds)? How far was she from the truck at the moment the brakes were applied (use a/g=0.35)?

Answer all the problems pls

A vehicle (A) of weight 20 kN skids through a stretch of 40 m before colliding with a parked vehicle (B) of weight 10 kN. After collision both the vehicles move through a distance of 20 m during which speed reduces to 20 kmph. Assume inelastic collision and coefficient of friction as 0.4. Determine the initial speed of moving vehicle.

Two vehicles A and B weighing 4.4 tonnes and 6.0 tonnes respectively, A from West and B from South, collide with each other at a right angle intersection. After the collision, vehicle A skids distance of 15 m in a direction 50° North of West and vehicle B, 36 m in 60° East of North. The initial skid distance of the vehicles A and B are 38 m and 20 m respectively before collision. Find out the original speeds of the vehicles, if the average skid resistance of the pavement is found to be 0.4. 2

1. (a) The following relationship between traffic speed and flow applies to a particular urban highway:- q = 192u - 44u In u where q = flow in veh/hr. u= speed in km/hr. Calculate the following:- (i) (iii) The mean speed when the highway flow is at maximum capacity The capacity of the highway The density at maximum flow capacity The space mean free speed The jam density (b) Plot diagrams to show the relationships between flow, speed and density given Question 1(a). Use these diagrams to describe what happens when flow changes from uncongested to congested along the highway.

The rated speed of a highway curve of 300-ft radius is 40 mph. If the coefficient of friction between the tires and the road is 0.60, what is the maximum speed at which a car can round the curve without skidding?

O-A vehicle is moving on a road of grade +4% at a speed of 20 m/s. Consider the coefficient of rolling friction as 0.46 and acceleration due to gravity as 10 m/s2. On applying brakes to reach a speed of 10 m/s, Find the required braking distance (in m, round off to nearest integer) along the horizontal.

Two drivers each have a reaction time of 2.5 seconds. One is obeying a 90 km/h speed limit, and the other is travelling illegally at 108 km/h. How much distance will each of the drivers cover while perceiving/reaction to the need to stop, and what will the total stopping distance be for each driver (using practical stopping distance and assuming roadway grade g = -2.5%). Longitudinal friction coefficient (fi) can be calculated by the equation f = 1.0371 V-0.2729 where V vehicle speed in km/h.|