1. A Ferrari sports car can accelerate at 18 m/s la) is this acceleration greate

Question

1. A Ferrari sports car can accelerate at 18 m/s la) is this acceleration greater than, less than, on equal to 18 for Explain (b) Determine the acceleration of a Porsche in fu.d Determine its acceleration in km/min, (3.28 ft-1m, 60s 1 min) A car in stop-and-go traffic starts at rest, moves forward 22 m in 8.0 sec, then comes to rest again. The velocity-versus-time plot for this car is given in the fgure. A). What distance does the car cover in the first 4 0 seconds of its motion? B). What distance does the car cover in the last 2 0 seconds of its motion? What is the constant speed V that characterizes the middle portion of its motion? 2. You drive a car 1450 ft to the east, then 2500 ft to the north. It the trip took 4 min and 20 sec, what were the direction and magnitude of your average velocity (in m/sh7 3. 4. An astronaut on the planet Zarcon tosses a rock horizontally with a speed of s.80 m/s. The rock falls throueh a vertical distance of 1 40 m and lands a horzontal distance of 9. 5 m from the astronaut What is the acceleration of gravity on Zarcon? A soccer ball is kicked from the ground with an initial speed of 15 mAfter 0.3 s its speed ss 13.1 m/s. Find the initial direction of the ball. 5

Explanation / Answer

2. distance = (4 v / 2) + (2 v) + (2 v / 2)

= 2 v + 2 v + v

22 = 5 v

v= 4.4 m/s

(A) d = 4 x 4.4 / 2 = 8.8 m

(c) d = v = 4.4 m

(d) v = 4.4 m/s

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