A ping pong ball rolls off a 5.Om high table and lands on the floor, 3.0maway from the table. How long is the ball in the air?

Answers

Answer 1

Answer:

Answer:

The ball was 1.01 seconds in the air

Explanation:

Horizontal Motion

When an object is thrown horizontally with a speed v from a height h, the range or maximum horizontal distance traveled by the object can be calculated as follows:

$\displaystyle d=v\cdot\sqrt{\frac {2h}{g}}$

If we know the value of d and h, we can solve the equation for v:

$\displaystyle v=d\cdot\sqrt{\frac {g}{2h}}$

Since the horizontal speed is constant, we can calculate the time the ball was in the air by using the equation:

$\displaystyle t=(d)/(v)$

The ping pong ball rolls from a height of h=5 m and lands on the floor a distance of d= 3 m away from the table. Calculate the speed:

$\displaystyle v=3\cdot\sqrt{\frac {9.8}{2\cdot 5}}$

$\displaystyle v=3\cdot\sqrt{\frac {9.8}{10}}$

Calculating:

$v=2.97\ m/s$

Now calculate the time:

$\displaystyle t=(3)/(2.97)$

$t=1.01\ sec$

The ball was 1.01 seconds in the air

Note: The time does not depend on the distance d at all. If we borrow the equation from free-fall motion, the time can be calculated with:

$\displaystyle t=\sqrt{\frac {2h}{g}}=\sqrt{\frac {10}{9.8}}=1.01\ sec$

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Explain why it’s hurt more carrying a heavy bag with a string of wire

Answers

Explanation:

Carrying a heavy bag with a string of wire can cause more pain compared to carrying a bag without a string of wire due to a few reasons.

Firstly, the presence of the string of wire adds additional pressure and strain on your hand, making it harder to grip and carry the bag comfortably. The wire can dig into your skin and cause discomfort or even pain. Imagine holding a bag with a smooth handle versus holding a bag with a sharp wire cutting into your hand - the latter would definitely be more painful.

Secondly, the wire can create friction against your skin. As you carry the bag and walk, the movement can cause the wire to rub against your hand, resulting in irritation and potentially even blisters. This friction can also cause the wire to dig deeper into your skin, intensifying the pain.

Lastly, the weight distribution of the bag can be affected by the presence of the wire. When you carry a heavy bag, it is ideal for the weight to be evenly distributed to minimize strain on specific areas of your body. However, the wire can create an uneven distribution of weight within the bag. This can lead to increased pressure and discomfort on certain parts of your hand, making it more painful to carry the bag.

In summary, carrying a heavy bag with a string of wire can hurt more due to the additional pressure and strain on your hand, the friction caused by the wire rubbing against your skin, and the uneven weight distribution within the bag. It is important to consider these factors when carrying heavy objects to minimize discomfort and potential injury.

What things can increase the rate of evaporation

Answers

Heat, gravitational pull, amount of gas and what type of gas in the air.

1:Temperature 2:Surface area 3:reduces density of surrounding water vapour in the air Hope this Helps!! :)

The attraction of liquid particles for a solid surface is due to ____.

Answers

Answer:

the force of adhesion.

Explanation:

The attractive force between the two types of molecules is called adhesive force.

So, the force between the liquid molecule and the solid molecule is adhesive in nature.

The attractive force acts between the two same type of molecules is called cohesive force.

This attraction occurs from adhesion, also known as adsorption

Force of attraction between the Earth(m=5.98x10^24) and a 70 kg student. distance of 6.38x10^6

Answers

F=G(m₁m₂/r²)
= 9.81(70*5.98x10²⁴/6.38x10⁶)
=9.81(6.56x10³¹)
=6.44x10³²

The main purpose of the turbine in the turbojet engine is to A. drive the compressor.
B. reduce the temperature of the exhaust gas.
C. increase the velocity of the exhaust gases.
D. compress the air. ~IT is NOT D.

Answers

The correct answer is A. drive the compressor. It's not D because the compressor compresses it, not the turbine. The temperature and the velocity of gasses are unrelated to this. There are in fact two turbines, and the first one gets power from exhaustion, which is then used to power to turbine in the turbojet that is used to drive the compressor. This is how turbojets commonly work.

What is the main difference between a longitudinal wave and a transverse wave? a longitudinal wave travels faster than a transverse wave. a transverse wave always has a larger amplitude than a longitudinal wave. the motion of the medium is parallel to a longitudinal wave and perpendicular to a transverse wave. the frequency is directly proportional to wavelength in a longitudinal wave but inversely proportional in a transverse wave.?

Answers

When waves propagate in a medium, then the motion of the medium is parallel to a longitudinal wave and perpendicular to a transverse wave.

What are sound waves?

A sound wave is caused by disturbances in the path of propagation of the particles. These disturbances can be caused in the medium like solid, liquid, and air.

There are two main types of waves namely - Transverse waves and longitudinal waves.

Transverse Waves - These waves are the waves where the particles in a medium travel perpendicular to the direction of the wave. These waves do not require a medium to travel and can travel in a vacuum also.

Longitudinal waves - These waves are the waves where the particles of the medium travel parallel to the direction of the wave and these waves require a medium to travel and hence, cannot travel in a vacuum.

Thus, we can conclude that the motion of the medium is parallel to a longitudinal wave and perpendicular to a transverse wave.

Learn more about the sound wave here:

brainly.com/question/3004869

Answer: The correct answer is the motion of the medium is parallel to a longitudinal wave and perpendicular to a transverse wave.

Explanation:

There are two main types of waves:

1. Transverse Waves: These waves are the waves where the particles in a medium travel perpendicular to the direction of the wave. These waves do not require a medium to travel and can travel in vacuum also. For Example: Light waves.

2. Longitudinal waves: These waves are the waves where the particles of the medium travel parallel to the direction of the wave and these waves require a medium to travel and hence, cannot travel in vacuum. For Example: Sound waves.

From the given options, the correct answer is the motion of the medium is parallel to a longitudinal wave and perpendicular to a transverse wave.

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