![학수번호 Course Code 수업담당교수 nstructor 과목명 일반물리학1 Subject 수업정보 Class Time 요일 Day me 유의사항 |. Electronic calculator is not allowed!! Note 2. Answer the questions in English or Kor 1] 125 points] A self-driving car is equipped with a device that detects an object by measuring the distance from the car to the object. After an object is detected, it takes 0.1 sec for the car to decide whether it stops or not. With the decision to stop made, the car immediately applies the brake and keeps the brake applied until it stops. The acceleration applied by the brake is -5 m/sec2. Assume the air resistance is negligible. (a) [10 points] While the car cruises at the speed of 72 km/h, it detects a standing obstacle 50 m ahead and decides to stop. What is the distance between the car and obstacle when the car stops? b) [15 points] Again the car cruises at the speed of 72 km/h. It t catches up to a van (whose height is 2 m) driving in front at the speed of 54 km/h. When the van is 50 m ahead of the car, an object (originally fixed on the vans top) suddenly gets released and starts the projectile motion with the initial velocity the same as the vans velocity. The object crashes to pieces after it hits the road, and the last detection of the full object is made when it hits the road. The car decides to stop after this last detection. What is the distance between the car and objects road-hitting position when the car stops? Assume g-9.8 m/sec2 and v9.8-3.](http://img.homeworklib.com/questions/9555d620-09b9-11ec-9ac7-e5fc1840e7c2.png?x-oss-process=image/resize,w_560)
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학수번호 Course Code 수업담당교수 nstructor 과목명 일반물리학1 Subject 수업정보 Class Time 요일 Day me 유의사항 |....
The speed limit in a school zone is 45 km/h. A driver traveling at this speed...
The speed limit in a school zone is 45 km/h. A driver traveling at this speed sees a child run onto the road 20 m ahead of his car. He applies the brakes, and the car decelerates at a uniform rate of 11.0 m/s2. If the driver's reaction time is 0.55 s, will the car stop before hitting the child?What is the stopping distance of the vehicle?
The city is trying to figure out how long the traffic light should stay yellow at...
The city is trying to figure out how long the traffic light should stay yellow at an intersection. The speed limit on the road is 45.0 km/h and the intersection is 23.0 m wide. A car is traveling at the speed limit in the positive direction and can brake with an acceleration of ?5.20 m/s2. (a) If the car is to stop on the white line, before entering the intersection, what is the minimum distance from the line at which...
please tell me the answer and process. Thank you！！ ou're driving down the highway late one...
please tell me the answer and process. Thank you！！
ou're driving down the highway late one night at 30 m/s when you spot a deer in brakes is 0.35s and the maximum deceleration of your car is 8.0 m/s. the road some distance in front of you. Your reaction time before stepping on the a) What is the total distance covered by your car from the time you first see the (8pts) deer to when you are at a complete...
Chapter 5 Q:6 A car that weighs 1.2 x 104 N is initially moving at a...
Chapter 5 Q:6
A car that weighs 1.2 x 104 N is initially moving at a speed of 37 km/h when the brakes are applied and the car is brought to a stop in 20 m. Assuming that the force that stops the car is constant, find (a) the magnitude of that force and (b) the time required for the change in speed. If the initial speed is doubled, and the car experiences the same force during the braking, by...
A car that weighs 1.4×104 N is initially moving at a speed of 50 km/h when...
A car that weighs 1.4×104 N is initially moving at a speed of 50 km/h when the brakes are applied and the car is brought to a stop in 15 m. Assuming that the force that stops the car is constant, find the magnitude of that force. Incorrect. Tries 5/20 Previous Tries Find the time required for the change in speed. Tries 0/20 If the initial speed is, instead, twice as great, and the car experiences the same force during...
Stopping sight distance (SSD) is defined as the distance needed for a driver to see an object on the roadway and t...
Stopping sight distance (SSD) is defined as the distance needed for a driver to see an object on the roadway and then stop before colliding with it. It's composed of the distance to react on first seeing the object and then the distance to stop after the brake is engaged. The following is a formula for determining stopping sight distance: ssi) = (. | c:/ + |-. SSD is the stopping sight distance (m or ft e is the conversion...
You are driving to the grocery store at 25 m/s . You are 110 m from...
You are driving to the grocery store at 25 m/s . You are 110 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.70 s and that your car brakes with constant acceleration. -How far are you from the intersection when you begin to apply the brakes? -What acceleration will bring you to rest right at the intersection? -How long does it take you to stop? A rock is tossed straight up with...
A driver is traveling at a speed of 70 km/h in car A when he looks...
A driver is traveling at a speed of 70 km/h in car A when he looks down to text a friend that he is running late. Just before he looks down. he is 80 m from an intersection, and a bicydist B, traveling at a constant speed of 10m/s,s d= 40 m from that same intersection. The light turns red during the 3 s text, and when the driver looks up, he hits the brakes, causing a constant deceleration of...
A couple of problems I was struggling with on my previous assignment 3. A fire dancer...
A couple of problems I was struggling with on my previous assignment 3. A fire dancer in china town makes circles with a ball on a string that is 25cm long. The amount of rotations the fireball makes count it to be 4 times every second. a. Find the speed and acceleration of the fireball. The dancer lets go of the string and the ball shoots into the air straight at you with an angle of 35 degrees to the...
An automobile is traveling on a long, straight highway at a steady 75.0 mi/h when the...
An automobile is traveling on a long, straight highway at a steady 75.0 mi/h when the driver sees a wreck 190 m ahead. At that instant, she applies the brakes (ignore reaction time). Between her and the wreck are two different surfaces. First there is 100 m of ice, where the deceleration is only 1.30 m/s2 . From then on, it is dry concrete, where the deceleration is a more normal 8.00 m/s2 . a). What was the car’s speed...
please tell me the answer and process. Thank you！！
ou're driving down the highway late one night at 30 m/s when you spot a deer in brakes is 0.35s and the maximum deceleration of your car is 8.0 m/s. the road some distance in front of you. Your reaction time before stepping on the a) What is the total distance covered by your car from the time you first see the (8pts) deer to when you are at a complete...
Chapter 5 Q:6
A car that weighs 1.2 x 104 N is initially moving at a speed of 37 km/h when the brakes are applied and the car is brought to a stop in 20 m. Assuming that the force that stops the car is constant, find (a) the magnitude of that force and (b) the time required for the change in speed. If the initial speed is doubled, and the car experiences the same force during the braking, by...
Stopping sight distance (SSD) is defined as the distance needed for a driver to see an object on the roadway and then stop before colliding with it. It's composed of the distance to react on first seeing the object and then the distance to stop after the brake is engaged. The following is a formula for determining stopping sight distance: ssi) = (. | c:/ + |-. SSD is the stopping sight distance (m or ft e is the conversion...
A driver is traveling at a speed of 70 km/h in car A when he looks down to text a friend that he is running late. Just before he looks down. he is 80 m from an intersection, and a bicydist B, traveling at a constant speed of 10m/s,s d= 40 m from that same intersection. The light turns red during the 3 s text, and when the driver looks up, he hits the brakes, causing a constant deceleration of...
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