A race car initially moving at 215 km/hr comes smoothly to rest with an acceleration of...
A car moving at 87 km/h has tires of 76 cm diameter. If the vehicle comes to a stop uniformly in 35 complete turns of of the tires (without skidding), what is the magnitude of the angular acceleration of the wheels? Your answer should be in rad/s2, but enter only the numerical part in the box.
A car moving at 90 km/h passes a 1.21 km -long train traveling in the same direction on a track that is parallel to the road. Part A If the speed of the train is 71 km/h , how long does it take the car to pass the train? Express your answer using two significant figures. Part B How far will the car have traveled in this time? Express your answer using two significant figures. Part C If the car...
In a car crash, a car going 40 km/hr takes 0.8 seconds to come to rest against a large tree. The car has a mass of 1000 kg. What was the average force between the tree and the car?
Problem #6 (Extra Credit) The minimum distance required to stop a car moving at 35 km/hr is 40 meters. What is the minimum distant required to stop a car moving a km/h r, assuming the same rate of acceleration? (20 points)
12) A sprinter running a 100 m race starts at rest and accelerates at constant acceleration A for 3.0 seconds and then maintains a constant velocity. In terms of A, what is the position of the runner after 3.0 seconds? What is A if the sprinter finishes the race in 12.0 seconds? 13) What force is needed to accelerate a 30.0 lb block at 2.2 m/s2? 14) What force is needed to stop a 1500 kg car in 40 m...
The acceleration of a race car for the first few seconds of the race can be approximated by the a(t) = A + Bt linear formula, where t is the time measured in seconds and the values of the constants A and B are: A = 16.0 m/s2 and B = -2.00 m/s3. What is the speed of the car 2.30 s after it starts from rest? How much distance does the car cover during this 2.30 s time period?
Part 2 (Choose 3 Nom TUTT I 1. A race car starts from rest and travels 400 meters in 5.2 seconds. When it crosses the finish line it has a final velocity of 140 m/s. a) What is the acceleration (a) of this car? b) How much time was spent traveling from 100 m/s to 140 m/s? c) If this car continued at this rate of acceleration, how long would it take for it to travel 800 meters? 2. A...
A car is initially at rest on a straight road. The graph shows the acceleration of the car along that road as a function of time. a) What distance does the car cover in the first 8 seconds? 4. 2 -1 -3 0 1 2 34 5 6 7 8 9 10 11 12 13 14 t (s)
A car is initially at rest on a straight road. The graph shows the acceleration of the car along that road as a function of time. What distance does the car cover in the first 9 seconds? 4. 2 -1 -3 0 1 2 34 5 6 7 8 9 10 11 12 13 14 t (s)
35. A car moving at 20 km/hr skids 10 m with locked brakes before coming to rest. How far will the car skid (on the same surface) if it is traveling at 80 km/hr?