PHYSICS MIDDLE SCHOOL

10. A girl pulls a wagon along a level path for a distance of 44 m. The handle ofthe wagon makes an angle of 22° above horizontal. If she pulls on the
handle with a force of 87 N, how much work is done?

Answers

Answer 1

Answer:

The work done on the wagon is 3549 J

Explanation:

The work done by a force when moving an object is given by

$W=Fd cos \theta$

where:

F is the magnitude of the force

d is the displacement

$\theta$ is the angle between the direction of the force and of the displacement

In this problem we have the following data:

F = 87 N is the magnitude of the force

d = 44 m is the displacement of the wagon

$\theta=22^(\circ)$ is the angle between the direction of the force and the displacement

Substituting, we find the work done

$W=(87)(44)(cos 22^(\circ))=3549 J$

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A straight horizontal line on a speed-time graph means the speedis constant. This means the speed is not changing over time.
How is this different from a distance-time graph?

Answers

Answer:

its devavtion is different from the distance changes process

Explanation:

Final answer:

A speed-time graph and a distance-time graph represent different aspects of motion. A horizontal line on the former indicates a constant speed (zero acceleration), while a straight, upward-diagonal line on the latter shows constant speed. A flat horizontal line on a distance-time graph shows no movement.

Explanation:

A speed-time graph and a distance-time graph each depict different aspects of motion. A horizontal line on a speed-time graph does indeed indicate constant speed or zero acceleration; the object is moving at a constant speed. However, a distance-time graph shows how the position of the object changes over time.

Let's take an example. If a car is traveling at a constant speed, on a speed-time graph, this would be represented by a horizontal line. The height of the line above the time axis represents the constant speed.

On a distance-time graph, a car moving at constant speed will be represented by a straight line with a positive slope. This is because the position of the car is continuously changing (it's covering distance), and at a constant rate. The slope of the distance-time graph gives us the speed of the car.

So, while a flat horizontal line in a speed-time graph indicates constant speed, a flat horizontal line in a distance-time graph would indicate no change in position, i.e., the object is not moving at all.

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Water moves from Earth's surface to the atmosphere and back to Earth's surface again in a process known as the water cycle. Which of the following is the major form of energy driving the water cycle?A. nuclear energy
B. geothermal energy
C. solar energy
D. chemical energy

Answers

That's heat from the sun, which evaporates the water. (Choice-C)

Answer:

That's heat from the sun, which evaporates the water. (Choice-C)

Explanation:

What would happen if your stomach wasint working properly

Answers

Your stomach, as in JUST your stomach?
Well the role of your stomach is to break down large clumps of food. Without that it would be very hard to impossible to digest food.

Which simple machine is best suited to assist with the task of moving heavy objects into a moving truck 1.5 meters above the groundA. screw
B. pulley
C. wedgd
D. inclined plane

Answers

Inclined plane because its purpose is to bring objects onto vechiles. Example: The ramp on a UHaul is an inclined plane.

Final answer:

The inclined plane is the best simple machine to assist with moving heavy objects into a truck. It allows for less force to be used by distributing the required force over a longer distance.

Explanation:

The simple machine that is best suited to assist with the task of moving heavy objects into a moving truck 1.5 meters above the ground is the inclined plane (option D).

An inclined plane is a flat surface that is inclined or sloped, which allows us to move objects up or down with less force. By using an inclined plane such as a ramp, we can reduce the amount of force needed to lift the heavy objects into the truck.

For example, instead of trying to lift a heavy object straight up into the truck, which would require a significant amount of force, we can use an inclined plane to gradually raise the object by pushing it up the inclined surface. This allows us to distribute the required force over a longer distance, making it easier to move the object.

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HURRY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!When a rubberband is stretched all the way back, it is an example of which type of energy?

Question 7 options:

Gravitational potential energy

Chemical potential energy

elastic potential energy

Mass kinetic energy

Answers

It is an example of "Elastic Potential Energy"

In short, Your Answer would be Option C

Hope this helps!

To calculate power, divide the amount of energy transferred by...?

Answers

Fairly simple...the answer is time.

Power, as you should have learned in your class, is a rate; it needs to be multiplied by time to get the amount of energy

Thus, your answer...time.

To calculate power, divide the amount of energy transferred by time.

Final answer:

Power in physics is the rate of energy transferred per unit time. It can be calculated by dividing the amount of energy transferred by the time required for the transfer.

Explanation:

In Physics, power is defined as the rate of transferring energy or the amount of energy per unit time. If you want to calculate the power, you take the amount of energy transferred and divide it by the time it takes for that transfer to occur. For example, if a light bulb transfers 100 joules of energy over 10 seconds, the power would be 100 joules divided by 10 seconds, which equals to 10 watts.