Answer:

**Work = Force times Distance **

**Work = 200 x 30 **

**Work = 6000 **

**The work done by a force of 200N on a body that moved 30m is 6000J or 6000 Joules. **

A child is sitting on the outer edge of a merry-go-round that is 18 m in diameter. if the merry-go-round makes 5.9 rev/min, what is the velocity of the child in m/s?

A convex mirror with a focal length of 0.25 m forms a 0.080 m tall image of an automobile at a distance of 0.24 m behind the mirror. What is the magnification of the image? Where is the car located, and what is its height? Is the image real or virtual? Is the image upright or inverted? Draw a ray diagram to show where the image forms and how large it is with respect to the object

A cord is used to vertically lower an initially stationary block of mass M = 3.6 kg at a constant downward acceleration of g/7. When the block has fallen a distance d = 4.2 m, find (a) the work done by the cord's force on the block, (b) the work done by the gravitational force on the block, (c) the kinetic energy of the block, and (d) the speed of the block. (Note : Take the downward direction positive)

After a package is dropped from the plane, how long will it take for it to reach sea level from the time it is dropped? assume that the package, like the plane, has an initial velocity of 342 km/hour in the horizontal direction. express your answer numerically in seconds. neglect air resistance.

In a warehouse, the workers sometimes slide boxes along the floor to move them. Two boxes were sliding toward each other and crashed. The crash caused both boxes to change speed. Based on the information in the diagram, which statement is correct? In your answer, explain what the forces were like and why the boxes changed speed.Box 1 has more mass than Box 2.Box 1 and Box 2 are the same mass.Box 1 has less mass than Box 2.**YOU MUST BE DESCRIPTIVE! Any short answers not explaining it wont get brainliest!**

A convex mirror with a focal length of 0.25 m forms a 0.080 m tall image of an automobile at a distance of 0.24 m behind the mirror. What is the magnification of the image? Where is the car located, and what is its height? Is the image real or virtual? Is the image upright or inverted? Draw a ray diagram to show where the image forms and how large it is with respect to the object

A cord is used to vertically lower an initially stationary block of mass M = 3.6 kg at a constant downward acceleration of g/7. When the block has fallen a distance d = 4.2 m, find (a) the work done by the cord's force on the block, (b) the work done by the gravitational force on the block, (c) the kinetic energy of the block, and (d) the speed of the block. (Note : Take the downward direction positive)

After a package is dropped from the plane, how long will it take for it to reach sea level from the time it is dropped? assume that the package, like the plane, has an initial velocity of 342 km/hour in the horizontal direction. express your answer numerically in seconds. neglect air resistance.

In a warehouse, the workers sometimes slide boxes along the floor to move them. Two boxes were sliding toward each other and crashed. The crash caused both boxes to change speed. Based on the information in the diagram, which statement is correct? In your answer, explain what the forces were like and why the boxes changed speed.Box 1 has more mass than Box 2.Box 1 and Box 2 are the same mass.Box 1 has less mass than Box 2.**YOU MUST BE DESCRIPTIVE! Any short answers not explaining it wont get brainliest!**

How much power is needed to lift a 750 kg elephant 14.3 m in 30.0 seconds?

**Given Information:**

Mass of elephant = m = 750 kg

Height = h = 14.3 m

time = t = 30 seconds

**Required Information:**

Power needed to lift elephant = P = ?

**Answer:**

Power needed to lift elephant ≈ 3507 watts

**Explanation:**

As we know power is given by

P = PE/t

Where PE is the potential energy and t is the time

Potential energy is given by

PE = mgh

Where m is the mass of elephant, g is the gravitational acceleration and h is the height to lift the elephant.

PE = 750*9.81*14.3

PE = 105212.25 Joules

Therefore, the required power to lift the elephant is

P = PE/t

P = 105212.25/30

P ≈ 3507 watts

**Answer:**

The wavelength of that tone in air at standard condition is 0.96 m.

**Explanation:**

Given that, a trombone can produce pitches ranging from 85 Hz to 660 Hz approximately. We need to find the wavelength of that tone in air when the trombone is producing a 357 Hz tone.

**We know that the speed of sound in air is approximately 343 m/s. Speed of a wave is given by :**

**So, the wavelength of that tone in air at standard condition is 0.96 m. Hence, this is the required solution.**

B) gamma rays

C) ultraviolet radiation

D) radio waves

E) sound waves

**Answer: Sound Waves**

**Explanation:**

Sound waves are the only waves on this list that are not part of the electromagnetic spectrum. This is because sound waves require a medium to travel (molecules to transmit the sound waves), while waves on the electromagnetic spectrum **do not **require a medium. They are able to travel through space for example, while sound would not be able to.

* Sound waves (E)* are not electromagnetic at all.

Microwaves, gamma rays, ultraviolet waves, and radio waves all are.

**Answer:**

the statements, the correct one is A

a downward force of gravity and an upward force exerted by the surface

**Explanation:**

When the disc is hit, a thrust force is exerted in the direction of movement, at the moment the disc moves this force loses contact and becomes zero.

When the movement is already established there are two main forces: **gravity **that acts downwards and the reaction force to the support of the disk called **normal **that acts upwards.

As it is not mentioned that there is friction, this force that opposes the movement is zero.

Analyzing the statements, the correct one is A

B) must be accelerating

C) may be slowing down

D) may be moving at constant speed

**Answer:**

hmmm thats too hard for me.

**Explanation:**

location of the pin?

**Answer:**

yes

**Explanation:**

it is in the body system

**Answer:**

it would show clearly because it is a metal piece in the body.