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MORE ABOUT PROBLEMS (juniors)

Some problems just stop developing harmonic motion.


1. A stone varies in circles at constant speed at the end of a rope, describing 50 revolutions in 30 seconds. What are the frequency and period of this movement?

2. A child is sitting on the edge of a platform rotating at 30 revolutions per minute. The platform has 10 m in diameter. What is the period of the motion and what is the speed of the child?

3. When a 200 g mass hangs from a spring. the height of this falls a distance of 1.5 cm. What is the spring constant k?

4. A mass of 400 kg is added to the initial mass of 200 g of the above problem. What will be the increase in the downward shift?

5. A mass oscillates at the frequency of 3 Hz (Hertz) and a width of 6 cm. What are their positions at times t = 0 and t = 3.22?

6. A 50 g mass oscillates with a MAS whose frequency is 0.25 Hz Suppose that t = 0 when the mass is at its maximum displacement. At what point will shift zero?

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MOVEMENT IN TWO DIMENSIONS (TEN)

1. A baseball bat shoots a horizontal with a speed of 20 m / s in a time of 0.25 seconds. How far will have traveled horizontally and vertically as will be dropped?

2. A bullet leaves the barrel of a gun with an initial horizontal velocity of 400 m / s. Find the horizontal and vertical displacement after 3 seconds.

3. A projectile has an initial horizontal velocity of 40 m / s at the edge of a roof. Find the horizontal and vertical components of its velocity after 3 seconds.

4. A plane flying at 70 m / s drops a load of groceries. What horizontal distance tour the box before hitting the ground 340 meters below?

5. In a timber, the logs are discharged horizontally at 15 m / s through a grease duct that is 20 m above a pond to contain wood. How far would the logs horizontally?