PHYSICS HIGH SCHOOL

An upward force is applied to a 6.0–kilogram box. this force displaces the box upward by 10.00 meters. what is the work done by the force on the box?

Answers

Answer 1

Answer:

Answer:

The work done by the force on the box is W = 588 J

Explanation:

The work done by the force on the box can be expressed as:

$W=mg(h_(2)-h_(1))$

where m is the mass of the box, g is the gravitational force g= $g=9.8(m)/(s^(2))$ and $h_(2)$ , $h_(1)$ are the heights of the box in at final and initial moment.

Replacing the values, you have:

$W=6.0kg*9.8(m)/(s^(2))*(10.00m-0.00m)$

$W=588(kgm^(2))/(s^(2))$

that is W = 588 J

Answer 2

Answer: work = fs = mgh [Ep] = 6(10)(10) = 100

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a 64kg skateboarder on a 2.0kg skateboard is on top of a ramp with a vertical height of 5.0 m what is the skateboarders maximum kinetic energy at the bottom of the ramp

Answers

The maximum kinetic energy of the skateboarders at the bottom of the ramp is 3234 J.

What is kinetic energy?

Kinetic energy is the energy of a body due to motion.

To calculate the maximum kinetic energy of the skateboarders at the bottom of the ramp, we use the formula below.

Formula:

K.E = Mgh............ Equation 1

Where:

M = mass of the skateboarder and the skateboard

K.E = maximum kinetic energy of the skateboarders at the bottom of the ramp

h = Height of the ramp
g = acceleration due to gravity.

From the question,

Given:

M = (2+64)M = 66 kgh = 5 mg = 9.8 m/s²

Substitute these values into equation 2

K.E = 66×5×9.8K.E = 3234 J

Hence, the maximum kinetic energy of the skateboarders at the bottom of the ramp is 3234 J.

Learn more about kinetic energy here: brainly.com/question/25959744

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The formula for a kinetic energy KE of a falling body is
KE = mgh
where m = mass, g = acceleration due to gravity (9.8 m/s^2, constant), h = height.

The total mass of a skateboader and a skateboard is 64 + 2.0 = 66 kg.

Finally,
KE = 66*9.8*5.0 = 32340 J

Which of the following statements is not true regarding atmospheric pressure?

Answers

Answer:

Atmospheric pressure increases with increasing altitude

Explanation:

Atmospheric pressure decreases with increasing height (altitude).

Ideally, there are no options given here with which the question can be answered, however after searching the question on google, a similar question popped up on two websites with the same set of options. doubnut.com and weegy.com and the options are;

A. Mercury and aneroid barometers are used to measure atmospheric pressure.

B. You calculate absolute pressure by adding atmospheric pressure to gauge pressure.

C. Atmospheric pressure increases with increasing altitude.

D. When atmospheric pressure is higher than the absolute pressure of a gas in a container, a partial vacuum exists in the container

When atmospheric pressure is higher than the absolute pressure of a gas in a container.

The velocity of the source is positive if the source is ______________. Note that this equation may not use the sign convention you are accustomed to. Think about the physical situation before answering.a. traveling in the +x direction
b. traveling toward the listener
c. traveling away from the listener

Answers

Answer: Answer is "B"

Explanation:

A physical situation of this question can be conceived as follows: If a siren is blowing through a certain distance in motion, then the listener find out that the velocity of the sound wave increases as the source of the siren is approaching the listener. The listener hear the maximum sound frequency and velocity of the source as it reaches him. However, the source velocity decreases as the siten moves away from the listener which can be said to be negative. Therefore, the correct answer is that the velocity increases as the source is moving towards the listener which is option "B"

Final answer:

In Physics, a positive velocity of a source usually indicates that the source is moving towards the observer or listener. This is based on the principles of the Doppler effect. The sign convention can change depending on the reference system

Explanation:

In the realm of Physics, particularly in the study of waves and sound, when we say that the velocity of the source is positive, it generally means that the source is traveling towards the listener. This is in line with the convention in Doppler effect, a phenomenon observed whenever the source of waves is moving with respect to the observer. Given this, the correct answer to your question would be (b) traveling toward the listener.

However, be mindful that the sign convention may vary depending on the context or the reference system being used. Still, the major principle remains: the perceived frequency is higher if the source is moving towards the observer, associated with a positive velocity; and lower if it's moving away, associated with a negative velocity.

Learn more about Velocity and Direction here:

brainly.com/question/1886551

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What animals can fall from the sky when it is raining

Answers

Answer: Cats and Dogs

Explanation:

That’s actually the silly term. The real answer depends how harsh it’s raining. Mostly it’s just bugs but sometimes a bird might lose control but it is very rare.

N a nuclear reaction, mass must be lost to produce energy. true or false

Answers

The answer is true. Nuclear reactions, unlike chemical reactions, do not explicitly follow the law of conservation of mass in the sense that part of the mass is lost in nuclear reactions. In nuclear reactions, some of the mass is actually converted to energy. This is made possible due to Einstein's equation: E = mc^2. Also, nuclear reactions make use of nucleons which give off greater energies than chemical reactions.

A car climbs 10.0 kilometers up a hill that inclines 8.0 degrees. What is the car's vertical displacement?