A car is traveling on a straight, level road under wintry conditions. Seeing a patch of ice ahead of her, the driver of the car slams on her brakes and skids on dry pavement for 50 m, decelerating at 7.5 m/s2. Then she hits the icy patch and skids another 80 m before coming to rest. If her initial speed was 70 mi/h, what was the deceleration on the ice?
Answer to relevant QuestionsOn a water slide ride, you start from rest at the top of a 45.0-m-long incline (filled with running water) and accelerate down at 4.00 m/s2. You then enter a pool of water and skid along the surface for 20.0 m before ...Sitting in a parked bus, you suddenly look up at a bus moving alongside and it appears that you are moving. Why is this? How about with both buses moving in opposite directions? A hot air balloon rises vertically with a speed of 1.5 m/s. At the same time, there is a horizontal wind blowing. In which direction is the balloon moving? (a) What is the sum of A-bar = 3.0 x + 5.0 y and B-bar = 1.0 x – 3.0 y-bar? (b) What are the magnitude and direction of A-bar of B-bar? Given two vectors, which has a length of 10.0 and makes an angle of 45o below the –x-axis, and which has an x-component of +2.0 and a y-component of +4.0, (a) Sketch the vectors on x– y axes, with all their “tails” ...
Post your question