4. Given A vehicle changes velocity from 80.0 km/hr to 20.0 km/hr in 6.00 seconds. Required: Find the uniform acceleration in ft/s2. Be sure to note the sign/direction (+ or -).
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- A vehicle moves in a straight line such that for a short time its velocity v = (0.4t + 0.6vt ) m/s !3! where t is in second (ift-D0, s=0).Determine it acceleration(a) when t=4sec? *The car travels around the portion of a circular track having a radius of r = 600 ft such that when it is at point A it has a velocity of 3 ft/s, which is increasing at the rate of 0.002t ft/s?, where t is in seconds. Determine the magnitudes of its velocity and acceleration when it has traveled two-thirds the way around the track. ATwo automobiles A and B are approaching each other in adjacent highway lanes. At t=0, A and B are 1km apart, their speeds are 108km/h and 63km/h and they are at the points P and Q respectively. Knowing that A passes point Q 40s after B was there and B passes P 42s after A was there, determine the uniform acceleration of A and B, when the vehicles pass each other and the speed of B at that time.
- Q1) While a car is moving with a speed 108 on a straight road the driver sees a truck which enters the road 75m ahead. The driver applies full brake 0.5s after s/he observes the truck, however the car hits the truck with a speed of 50. Then what would be the maximum initial speed of car in when the driver observes the truck in order that the car does not hit the truck with all other conditions are the same?The function V() = 2.5r can be used to estimate the maximum safe velocity V in kph at %3D which a car can travel if it is driven along a curved road. Find the maximum speed if a clover leaf exit on an expressway has a radius of curvature of 300 meters. Select one: O a. 28.2 kph O b. 27.4 kph O c. 26.84 kph O d. 30 kphThe gap between two consecutive automobiles (distance between the back of a vehicle and the front of the following vehicle) is 65 ft. At a certain time, the front vehicle is traveling at 45 mi/h, and the following vehicle at 35 mi/h. If both vehicles start accelerating at the same time, determine the gap between the two vehicles after 15 sec if the acceleration of the vehicles can be assumed to take the following forms: du/dt = 3.4 - 0.07u, (leading vehicle) du/dt = 3.3 - 0.065u, (following vehicle) where ut is the vehicle speed in ft /sec.
- An impatient car driver stuck behind a slow-moving truck traveling at 25 mi/h decides to overtake the truck. The accelerating characteristic of the car is given by: dv/dt=3-0.05v where v is the speed (ft/sec) and t is the time (0sec).What is the acceleration in meter per second after 25 seconds?Please answer this NEATLY, COMPLETELY, and CORRECTLY for an UPVOTE. A motorist is about to enter the exit ramp of a highway. When it is 50m before reaching A (along the straight path), the motorist travels at 80km/h, decreasing at the rate of 0.5m/s2until it reaches B. After it reaches B, it travels at a constant speed. Determine the magnitude of the acceleration: just after A just before B just after BFor the instant represented, car A is rounding the circular curve at a constant speed of 23 mi/hr, while car B is slowing down at the rate of 4.5 mi/hr per second. Determine the magnitude of the acceleration that car A appears to have to an observer in car B.
- A car starts from rest and travels 10 sec. with an acceleration of a = 4 – 0.3t, then runs for 30 sec. at constant velocity and finally comes to rest by decelerating at 3.125 m/s2. Determine the velocity of the car after 10 sec. Determine the distance traveled by the car during the period of 10 sec. c. Determine the total distance traveled by the car until it stops.The car is traveling at a constant speed through a dip in the road. The radius of curvature of the road at point A, the bottom of the dip is 471m. What speed of the car (kph) would result in an acceleration of magnitude 0.2g when the car is at A? use 3 decimal places2. A Hyundai Santa Fe travels a 1.30km levelled road from Bonifacio roundabout to City Lights Hotel in a minimum time of 45.60seconds. Given that the car accelerates and decelerates at 2.53 m/s², which starts from rest at the roundabout and coming to a stop at the Hotel, determine the maximum speed (in kph) and the time (in seconds) it travel at this speed. Assume time for acceleration and deceleration are equal.