A person uses a screwdriver to turn a screw and insert it into a piece of wood. The person applies a force of 20 newtons to the screwdriver and turns the handle of the screwdriver a total distance of 0.5 meter. How would these numbers be different if the person inserted a nail with a hammer instead of the screw with the screwdriver?A. The force applied would be greater, but the distance would be shorter.

B. The force applied would be less, but the distance would be greater.

C. The force applied would be the same, but the distance would be shorter.

D. The force applied would be the same, but the distance would be greater.

Answers

Answer 1

Answer:

If the person inserted a nail with a hammer instead of the screw with the screwdriver, the force applied would be greater, but the distance would be shorter. The correct option is A.

What is force?

The action of push or pull in order to make a body change its state of motion or rest is called Force.

As the force is pressure per unit area. Force is inversely proportional to the area over which force is to applied.

The hammer would take more force to insert the nail. The screw has its helix which is to be inserted and application of force is small.

Thus, the force applied would be greater, but the distance would be shorter. The correct option is A.

Learn more about force.

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t if the person inserted a nail with a hammer instead of the screw with the screwdriver?

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a 0.4 kg block rests on a desk. the coefficient of static friction is 0.2. You push the side of the block but do not have a spring scale to measure the force you use. the block does not move. which statement is true about the force of static friction?

Answers

Answer:

D. It is no smaller than $0.78N$

Explanation:

The question is incomplete. These are all the options :

A. It is no larger than $0.78N$

B. It is $0.78N$

C. It is $0.08N$

D. It is no smaller than $0.78N$

To solve this problem, we have the data of :

$m=0.4kg$

Where ''m'' is the mass of the block

μ = 0.2

Where ''μ'' is the coefficient of static friction

If we want to find the magnitude of the force of static friction we need to use the following equation :

$F_(sf)=$ μ. $F_(N)$ (I)

Where '' $F_(N)$ '' is the normal force that the desk exerts on the block. Its magnitude is equal to the weight (because we suppose that the block rests horizontally on the desk).

The weight '' $W$ '' can be calculated as :

$W=m.g$

Where ''m'' is the mass and ''g'' is the acceleration due to gravity.

The value of ''g'' is

$g=9.81(m)/(s^(2))$

The weight of the block is

$W=(0.4kg).(9.81(m)/(s^(2)))$

$W=3.924N$

Now, the weight is equal to the normal force ⇒

$W=F_(N)=3.924N$

Using the equation (I) :

$F_(sf)=(0.2).(3.924N)$

$F_(sf)=0.7848N$

The correct option is D. It is no smaller than $0.78N$

Static friction is greater than Applied force

Suppose the angular separation of two stars is smaller than the angular resolution of your eyes. How will the stars appear to your eyes?

Answers

Answer:

The two stars will look like a single point of light.

Explanation:

When the angular separation is smaller than angular resolution, the eye will not be able to resolve the stars thus they will appear like a point source of light.Angular resolution is one of the limit that our eyes can see. Angular resolution describes how much our eyes can distinguish two things apart which depends on the angle created by the incoming light rays from the two object. A smaller angle, very small angle for light rays to enter the eye thus little or no details for the eye to distinguish.

Final answer:

When two stars are closer together than the angular resolution of our eyes, they appear as a single point of light.

Explanation:

When the angular separation of two stars is smaller than the angular resolution of our eyes, they will appear as a single point of light to our eyes. This is because our eyes cannot distinguish the individual stars due to their close proximity. This is similar to how distant stars appear as pinpoints of light.

Learn more about Angular separation of stars here:

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How does the muscular system help humans maintain posture?

Answers

The muscular system is an organ system composed of skeletal, smooth and cardiac muscles. This system allows movement of the body, maintains posture, and circulates blood throughout the body.

>Muscles continually align themselves vertically to help maintain posture.

Energy is transferred by the process of convection from the hot water at the bottom of the tank to the cooler water at the top. Explain how

Answers

When hot water comes in contact with cold water , the hot water from the bottom of the vessel is hot and so reduces its density. So low density ware goes up and cold water from side or above replaces the space. This is how Energy is transferred by the process of convection from the hot water at the bottom of the tank to the cooler water at the top.

What is convection?

The process of heat transfer from one part of a fluid to another part by the actual movement of the particles of the fluid is called convection. Liquid and gases are heated by the process of convection.

learn more about convection

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The transfer of energy means, in convention process, transport of matter. In this case, hot water has lower density than cool water. The water with less density ascends and leaves gaps that are occupied with cooler water "packages".

Justin is standing in the tee box and swings the golf club. As he swings, the end of the golf club gains speed and _____________. A. Chemical energy B. Kinetic energy C. Potential energys he swings,

Answers

Kinetic energy is gained.

Potential energy is gained here as he swings.

What is the kinetic energy of a 1.0-kg ball moving at 3.0 m/s?

Answers

Kinetic Energy = (1/2)mv²

= (1/2)*1*3² = 0.5 *1 * 9 = 4.5

Kinetic Energy = 4.5 Joules

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