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alexandr402 [8]
3 years ago
13

If you push an object horizontally on a surface, (a) how many forces will act on the object? (b) Name the forces, and (c) will g

ravity be acting on the object?
Physics
1 answer:
Whitepunk [10]3 years ago
5 0

Answer:

a. 5

b. gravity, weight, pull, velocity, and energy.

c. gravity will be acting on the object by pulling it to wherever the object headed.

Explanation:

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The object experiences two external forces: 60 N to the west and 130 N to the east. What is the net external force?
MArishka [77]

Answer: 70 N to the East

Explanation:

lets assume east is positive and west is negative, since they are in opposite directions the net external force = F1+F2

Net force = (-60) + 130

Net force = 70

or

Net force = 70 N in the east direction

4 0
3 years ago
Two blocks, stacked one on top of the other, slide on a frictionless horizontal surface. The surface between the two blocks is r
devlian [24]

Answer:

F_{net} = 31.88 N

Explanation:

When top block is just or about to slide on the lower block then we can say that the frictional force on it will be maximum static friction

So we will have

F_{net} = ma

F_s = ma

\mu_s mg = ma

a = \mu_s g

a = (0.50)(9.81)

a = 4.905 m/s^2

now for the Net force on two blocks to move together

F_{net} = (m_1 + m_2) a

F_{net} = (2.3 + 4.2)(4.905)

F_{net} = 31.88 N

4 0
3 years ago
Most metals are good electrical conductors because (5 points) they hold their electrons they have a large amount of free electro
Hunter-Best [27]

Answer:

  • Metals are good conductors of electricity <u>because they have free electrons</u> which help in the transfer of charge from one point to another.

6 0
3 years ago
What disadvantages does a conveyor belt have?
leva [86]

Answer:1. Belt Conveyor System

Advantages

One of the cheapest conveyors

Simple and easy to use

Can have changes in elevation

Can be loaded from any place along the belt

Disadvantages

The simplicity means very limited features

Belt can be difficult to clean and generally does not leave a very successful result

Sticky material can get stuck on the belt and transfer to the return side, the rolls, idlers and pulleys

2. Roller Conveyor System

Advantages

Can use gravity for moving the product on a decline angle

No power means less cost and more environmentally friendly

Quite modular andcan be utilized in many ways

Fairly low maintenance

Disadvantages

Products may end up being damaged when moved by gravity

Heavy and therefore not very portable

No control of conveyor speed

3. Powered Roller Conveyor System

Advantages

Effective horizontal transportation over a longer distance

The speed and also the process can be easily controlled and the risk for damage is reduced as the parts never touch

The small zones of the system are powered independently and can be set up to run only when an item is present

If a motor breaks down, it will only stop one zone

Disadvantages

Noisier than many other conveyors

More expensive than other conveyors

Not as flexible with what type of items it can handle

4. Overhead Conveyor System

Advantages

Can utilize the space overhead maximizing the full capacity of a facility

Buffer stores of serial produced components can be stored and sequentially delivered to a pick point when required

Full production systems can be created in a friction drive overhead conveyor using multi drive technology offering speed differentials

Lower operating costs and known for being very safe

Disadvantages

Generally more expensive than a floor based conveyor system

If breaking down, it can be more challenging to repair if no foresight at the planning stage and installation for maintenance

If chain based, it tends to need continual lubrication meaning grease or oil might drop from the system

As you can see, there are pros and cons for each conveyor system. One of the most important things to consider is therefore your specific business and the type of material you wish to transport. Some of the material’s characteristics to consider are size, weight, and density. But key considerations should also be the size of the system compared to the size of your facility as well as the environment itself – temperature, humidity and vibration for example. Feel free to contact us and we’ll help you determine any potential risks and possible countermeasures in order to create the safest and most effective environment.

Explanation:

7 0
3 years ago
Define the terms "Calorie" and "Joule"​
Paraphin [41]

Answer:

A calorie is defined as the amount of energy needed to raise the temperature of one gram of water one degree Celsius.

Explanation:

The other unit used to measure heat is the joule. The joule is the SI (System International) unit

5 0
3 years ago
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