Question

1. Two objects (A and B) are at rest and separated by a distance of 1200 meters. At the same moment, they accelerate towards each other. The magnitude of the acceleration of A is 6 m / s2, while the magnitude of the acceleration of B is 2 m / s2. Eventually the objects collide, as illustrated. Determine the speed of each object at the time of the crash

2. A person throws a ball upwards from a height of 20 meters with respect to the ground. Calculate the time for the ball to reach the ground if the initial speed is 15 m / s.

3. A car travels 500 meters in 5 seconds by uniformly accelerated movement. It is detected that the difference between its final speed and its initial speed is 50 m / s. Calculate the initial speed of the car.

4. A person is at the top of a mountain. He throws a ball straight up with an unknown speed. The ball reaches the maximum height of 490 meters (measure from the base of the mountain). It also took 12.5 seconds for the ball to reach the base of the mountain. Determine the initial speed of the ball, and what is the height of the mountain.

Answer 1

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