1. A car is traveling at 36 km/hr and the driver puts on the brakes, bringing the car to rest in a time of 2s. What is the magnitude of the average acceleration of the car.
1. A car is traveling at 36 km/hr and the driver puts on the brakes, bringing the...
The driver of a 1550 kg car, initially traveling at 12.1 m/s, applies the brakes, bringing the car to rest in a distance of 18.5 m. (a) Find the net work done on the car. (b) Find the magnitude and direction of the force that does this work. (Assume this force is constant.)
A race driver traveling at a speed of 230 km hr on the straightaway applies his brakes at point Ά and reduces his speed at a uniform rate to 170 km hr at C in a distance of 160 + 150 = 310 m. Calculate the magnitude of the total acceleration of the race car an instant after itpasses point B a= 7.405 m/sec 2 470 m -150m にゅーー4. 160m.
A car of mass 875 kg is traveling 30.0 m/s when the driver applies the brakes, which lock the wheels. The car skids for 5.60 s in the positive -direction before coming to rest. (a) What is the car's acceleration? (b) What magnitude force acted on the car during this time? (c) How far did the car travel? [Ans: ()-536 m/s (b) 4690 N(c) 84,0 m]
A car of mass 772 kg is traveling 24.4 m/s when the driver applies the brakes, which lock the wheels. The car skids for 5.27 s in the positive x-direction before coming to rest. a). What is the car's acceleration (in m/s2)? (Indicate the direction with the sign of your answer.) b). What magnitude force (in N) acted on the car during this time? c). How far (in m) did the car travel?
11.78 A car is traveling at a constant speed of 54 km/h when its driver sees a child run into the road. The driver applies her brakes until the child returns to the sidewalk and then accelerates to resume her original speed of 54 km/h; the acceleration record of the car is shown in the figure. Assuming x = 0) when t = 0, determine (a) the time t, at which the velocity is again 54 km/h, (b) the position...
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?
5. The driver of a car travelling 75.0 km/hr suddenly sees road construction up ahead. She takes 2.30 s to begin applying the brakes. The car slows down at a constant rate of 10.0 km/br's for until she comes to a stop. a. Draw a picture showing the various intervals of the car's motion and accelerations, b. Calculate the average acceleration of the car after the driver applies the brake c. What is the total distance the car travelled from...
A car traveling 93 km/h strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.85 m . What was the magnitude of the average acceleration of the driver during the collision? Express the answer in terms of "g's," where 1.00g=9.80m/s2.
The driver of a car traveling on the highway suddenly slams on the brakes because of a slowdown in traffic ahead. A) If the car’s speed decreases at a constant rate from 74 mi/h to 50 mi/h in 3.0 s, what is the magnitude of its acceleration, assuming that it continues to move in a straight line? Answer is in mi/h^2 B) What distance does the car travel during the braking period? Answer is in ft
A car traveling 54.7 km/h is 21.1 m from a barrier when the driver slams on the brakes. The car hits the barrier 2.15 s later. (a) What is the car's constant deceleration magnitude before impact? (b) How fast is the car traveling at impact?