A sports car accelerates uniformly from rest, reaching a speed of 30 meters per second in 6 seconds. During the 6 seconds, the car has traveled…
A coyote can run at a speed of 20 m/s while a prairie dog can manage only 5.5 m/s. If a prairie dog is 45 meters in front of a coyote, how much time does the prairie dog have to reach its hole without being caught?
100 meters
A model rocket accelerates from rest upwards at 50 m/s2 for 2.0 seconds before its engine burns out. The rocket then coasts upward. What is the maximum height that the rocket reaches? You may assume air resistance is negligible.
510 meters
610 meters
1020 meters
1220 meters
In the absence of air resistance, an object dropped near the surface of the Earth experiences a constant acceleration of about 9.8 m/s2. This means that…
the object falls 9.8 meters during the first second only
the speed of the object increases 9.8 m/s during each second
the rate of change of the displacement with
the speed of the object as it falls is 9.8 m/s
the object falls 9.8 meters during each second
respect to time for the object equals 9.8 m/s2.
A bird is flying in a straight line initially at 10 m/s. It uniformly increases its speed to 15 m/s while covering 25 meters. What is the magnitude of the acceleration of the bird?
2.0 m/s2
0.2 m/s2
0.5 m/s2
5.0 m/s2
2.5 m/s2