# Elf- Number Lock

leviegej

Created on November 28, 2023

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## Transcript

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?

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.

100 meters

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 each second

the rate of change of the displacement with

the object falls 9.8 meters during the first second only

the speed of the object as it falls is 9.8 m/s

the speed of the object increases 9.8 m/s 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?

0.2 m/s2

2.5 m/s2

0.5 m/s2

5.0 m/s2

2.0 m/s2