Question

1. An automobile starts from rest and accelerates to a final velocity in two stages along a straight road. Each stage occupies the same amount of time. In stage 1, the magnitude of the car's acceleration is 2.99 m/s². The magnitude of the car's velocity at the end of stage 2 is 2.20 times greater than it is at the end of stage 1. Calculate the magnitude of the acceleration in stage 2.

2. The Space Shuttle travels at a speed of about 7.23E+3 m/s. The blink of an astronaut's eye lasts about 104 ms. How many football fields (length = 91.4 m) does the Shuttle cover in the blink of an eye?

3.A hot-air balloon is rising upward with a constant speed of 2.11 m/s. When the balloon is 3.11 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?

Answer 1