A car travels a certain distance along a straight road (in the +x direction). The distance the car travels as a function of time is shown in the figure below. When the car changes speed it does so uniformly. Select the appropriate choice for each statement. 1000 E 800 600 400 200 20 40 60 80 Time (s) Greater than v The x-acceleration is ..... zero at 7 sec . v At 4 sec, the speed is as high as it gets. The speed is .... zero at 20 sec. The acceleration magnitude at 38 sec is ..... the acceleration magnitude at 15 sec. True Equal to Equal to Greater than v The x-acceleration is ..... zero at 15 sec. Less than v The speed at 76 sec is .... the speed at 4 sec. Distance

A burst water pipe in the city means you have to drive at a steady 12 km/h. Once past this obstacle, you speed up to 52 km/h in 10 s. You reach the freeway and, with the same acceleration, speed up for another 10 s to reach a higher speed. What is this final speed in km/h to one decimal place?

A car travels a certain distance along a straight road (in the +x direction). The distance the car travels as a function of time is shown in the figure below. When the car changes speed it does so uniformly. Select the appropriate choice for each statement. The x-acceleration is ..... zero at 38 sec. The x-acceleration is ..... zero at 48 sec . 1000 The speed is ..... zero at 23 sec. |At 7 sec, the speed is as high as it gets. | The acceleration magnitude at 38 sec is ..... the acceleration magnitude at 15 sec. The speed at 7 sec is ..... the speed at 79 sec. 800 600 400 200 20 40 60 80 Time (s) Distance (m)

A car traveling at 16.8 m/s is 20.7 m from a barrier when the driver slams on the brakes. The car hits the barrier 2.54 s later. What was the acceleration of the car? Be careful to get the sign correct! Express your answer in m/s? to 3 significant figures.

There is a 1500 mile race course. The max forward acceleration is 4 m/s2 and the max backward acceleration is 6 m/s2. I start at 600 m and must go to the 800 m mark (I must travel 200 m). What is an equation for the fastest time that I could get to 800 m? What is the position, time, and velocity of my vehicle?

A Honda Civic drives for 1000 meters at a speed of 5.0 m/s. It then speeds up and travels another 1000 meters at 100 m/s. What is the average speed of the car? O 9.5 m/s O 53 m/s^2 O 210 s O 0 m/s Question ? 10

An automobile accelerates from rest at 2.1 m/s2 for 17.4 s. The speed is then held constant for 24.9 s, after which there is an acceleration of -2.9 m/s2 until the automobile stops. What is the total distance traveled?   .........................m

At t=0 an object has a velocity of 35 m/s and a steady acceleration of -10 m/s2.   Make a sketch of velocity vs. time for this motion from t=0 to t=5 s. Make a sketch of acceleration vs. time for this motion from t=0 to t=5 s. Does the object change directions between 0 and 6 s?

A car moves in a straight line with constant acceleration. Starting from rest at t=0 it travels 8m in 4s. What is the speed of the car at t=4s? I got 2m/s but I'm not sure that's right, I would love a step by step.

A police car waits in hiding slightly off the highway. A speeding car is spotted by the police car doing 40 m/s. At the instant the speeding car passes the police car, the police car accelerates from rest at 4 m/s² to catch the speeding car. How long does it take the police car to catch the speeding car?