You are driving your car, and the traffic light ahead turns red.You apply the brakes for 2.73 s, and the velocity of the cardecreases to + 5.37 m/s. The car’s deceleration has a magnitude of3.02 m/s2 during this time. What is the car’s displacement? x =
A dynamite blast at a quarry launches a rock straight upward,and 1.8 s later it is rising at a rate of 10 m/s. Assuming airresistance has no effect on the rock, calculate its speed (a) atlaunch and (b) 4.4 s after launch.
Concept Simulation 2.3 provides some background for thisproblem. A ball is thrown vertically upward, which is the positivedirection. A little later it returns to its point of release. Theball is in the air for a total time of 8.36 s. What is its initialvelocity? Neglect air resistance. v0 =
Concept Simulation 2.3 offers a useful review of the conceptscentral to this problem. An astronaut on a distant planet wants todetermine its acceleration due to gravity. The astronaut throws arock straight up with a velocity of +21.2 m/s and measures a timeof 18.4 s before the rock returns to his hand. What is theacceleration (magnitude and direction) due to gravity on thisplanet? (positive = up, negative = down)
A hot-air balloon is rising upward with a constant speed of 3.78m/s. When the balloon is 9.24 m above the ground, the balloonistaccidentally drops a compass over the side of the balloon. How muchtime elapses before the compass hits the ground? From her bedroomwindow a girl drops a water-filled balloon to the ground, 8.93 mbelow. If the balloon is released from rest, how long is it in theair?
From her bedroom window a girl drops a water-filled balloon tothe ground, 8.93 m below. If the balloon is released from rest, howlong is it in the air?
