A car is travelling at the speed V on a straight, level road. After the brakes are applied at t-0, the motion can be approximated by t3 - t2 + 17t 100 where x is the distance traveled in meters and t is the time in seconds. Which o the following gives the distance required for the car to stop? Select the correct response 82 m 81 m 80 m 83 m < Previous
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- The function s = f(t) gives the position of a body moving on a coordinate line, with s in meters and t in seconds. s=t3+2t2−2t,0≤t≤2 Find the body's speed and acceleration at the end of the time interval.A car is travelling at the speed of V m/s on a straight, level road. After the brakes are applied at t = 0, the motion can be approximated by s = (1/116)(t^3) - t^2 + 17t, where s is the distance traveled in meters, and t is the time in seconds. Determine the distance (meters) required for the car to stop.A car travelling at the speed Vo on a straight level road. After the brakes are applied at t = 0, the motion can be approximated by s = ?^3/100− ?^2 + 17? where s is thedistance traveled in meters and t is the time in seconds. a. gives the value of Vo b. gives the distance required for the car to stop.
- A car is traveling at the speed of V m/s on a straight, level road. After the brakes are applied at t = 0, the motion can be approximated by s = (1/112)(t^3) - t^2 + 10t, where s is the distance traveled in meters, and t is the time in seconds. Determine the distance (meters) required for the car to stop.In 1992, a 14-kg meteorite struck a car in Peekskill, NY, leaving a 20-cm-deep dent in the trunk. If the meteorite was moving at 500 m/s before striking the car, what was the magnitude of its acceleration while stopping? Find the time it takes for the meteorite to come to a complete stop.Cars A and B are traveling at vA=116 km/hr and vB=108 km/hr respectively when the driver of Car B applies the brakes abruptly causing the car to slide to a stop, see Figure Q1. Take the coefficient of friction for the road to be 0.8. Suppose the driver of Car A takes 1.5 seconds to react to the situation and applies his brakes causing Car A to slide as well. Given Car A has the same deceleration as Car B calculate the minimum distance, d between A and B at the time Car B starts sliding, to avoid a car crash.
- .A truck starts from rest at t = 0 and reaches a final speed v at time t. Which of the following statements is/are true if the acceleration of the of the truck is constant (and nonzero) during this time? The car travels a distance vt. The average speed of the car is v/2. The magnitude of the acceleration of the car is v/t. The velocity of the car remains constant.A cheetah can reach the top speed of 114 km/h. A cheetah starts from rest and runs 48 m in a straight line, reaching a final speed of 94 km/h. 1. what's the average acceleration during sprint (m/s^2) 2. find displacment at t=3.0 s assuming constant acceleration throughout sprintThe acceleration of a car s after starting from rest is (75+10t-t2)/20 until the instant when this expression vanishes. After this instant the speed remains constant. A.Find the maximum acceleration B. Time taken to attain the greatest speed C.The greatest speed.
- You're an investigator for the National Transportation Safety Board, examining a subway accident in which a train going at 90 km/hkm/h collided with a slower train traveling in the same direction at 24 km/hkm/h . Your job is to determine the relative speed of the collision, to help establish new crash standards. The faster train's "black box" shows that it began negatively accelerating at 2.1 m/s2m/s2 when it was 52 mm from the slower train, while the slower train continued at constant speed. What do you report ?A racing car starts from rest at t = 0 and reaches speed v at time t. If the acceleration of the car is constant during this time, which of the following statements is true? a. The velocity of the car remains constant. b. The car travels a distance = V t. c. None of statements (a) through (d) is true. d. The magnitude of the acceleration of the car is v/t, e. The average speed of the car is 2v.Modern oil tankers weigh more than a half-million tons and have lengths of up to one-fourth mile. Such massive ships require a distance of 5.0 km (about 3.0 mi) and a time of 20 min to come to a stop from a top speed of 30 km/h. What is the magnitude of such a ship’s average acceleration in m/s2 in coming to a stop?