PHYSICS HIGH SCHOOL

The leaning tower of Pisa is about 56 meters tall. A ball released from the top takes 3.4 seconds to reach the ground. The final velocity of the ball before it hits the ground is 33 meters/second. Assuming that the ball experienced a constant acceleration throughout this descent, calculate the magnitude of the acceleration

Answers

Answer 1
Answer:

Answer:The magnitude of the acceleration is 9.70 m/s^2

Explanation:

Final velocity of the ball falling down ,v = 33 m/s

Initial velocity of the ball ,u= o m/s

Time taken by the ball to reach the ground ,t = 3.4 seconds

Acceleration of the ball during the fall = a

Using first equation of motion:

v=u+at

33 m/s=0 m/s+a(3.4 s)

a=(33 m/s)/(3.4 s)=9.70 m/s^2

The magnitude of the acceleration is 9.70 m/s^2
Answer 2
Answer: The acceleration of the ball would be around 9.1666667m/s
To work this out use this formula 

acceleration = distance*velocity/distance*time

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What is an object's change in position, or displacement, and the change in time over which that displacement occurred used to calculate?a. average velocity
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Answers

the answer is a  average velocity

If gravity did not affect the path of a horizontally thrown ball, the ball would ____.

Answers

If net force acting on the ball is zero(here if no gravitational force acts on the body), the ball will continue its motion in the same direction. Hope this helps.

Answer:

travel Horizontally

Explanation:

The orbits of planets being elliptical was one the planetary laws developed by

Answers

The correct answer is Kepler

Final answer:

The concept that planets move in elliptical orbits was established by Johannes Kepler in his First Law of Planetary Motion. This significant idea disrupted the earlier belief of circular orbits and brought tremendous knowledge in our solar system understanding.

Explanation:

The fact that the orbits of planets are elliptical was part of the planetary laws developed by the renowned astronomer and mathematician Johannes Kepler. Damaging the former belief of circular orbits, Kepler, based on detailed and exhaustive astronomic observations, established his First Law of Planetary Motion which stated that planets move in elliptical orbits with the Sun at one of the two foci. This was a significant breakthrough in understanding our solar system and continues to be fundamental in physics and astronomy today.

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A graduated cylinder has 20 ml (cm3) of water placed in it. An irregularly shaped rock is then dropped in the graduated cylinder and the volume of the rock and water in the cylinder now reads 30 ml (cm3). The mass of the rock dropped into the graduated cylinder is 23 grams.a.) Find the volume of the rock dropped into the graduated cylinder.
b.) Find the density of the rock dropped into the graduated cylinder.

Answers

A) Volume = displacement
Therefore the rock has a volume of 10mL
B) density = Mass/ Volume
 Therefore density = 23/10 = 2.3 per unit volume

Final answer:

The volume of the rock dropped into the graduated cylinder is 10 ml. The density of the rock is 2.3 g/ml.

Explanation:

We first determine the volume of the rock dropped into the graduated cylinder. The initial volume of water in the cylinder is 20 ml, and after placing the rock, the total volume increases to 30 ml. Therefore, the volume of the rock is the total volume minus the initial volume of the water, which is 30 ml - 20 ml = 10 ml.

Next, we find the density of the rock. The formula for density is mass/volume. Given that the mass of the rock is 23 grams and the volume is 10 ml, the density of the rock would be mass/volume = 23 grams / 10 ml = 2.3 g/ml.

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Answers

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Answers

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