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patriot [66]
3 years ago
14

Give me an example of an situation in which it would an advantage to use a pulley to do work . PLEAZE HELP ME ASAP (NOW)!!!!!!!!

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Physics
2 answers:
soldi70 [24.7K]3 years ago
4 0
Pulleys can be used to lift heavy objects that otherwise may not be able to be lifted. They reduce the amount of force it takes to lift a load.
Art [367]3 years ago
3 0
If you ever needed to lift a heavy/large object to an inaccessible area, for example, if you lived in an apartment building on a higher floor and needed to get a prebuilt couch (screw ikea) up there.
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What is the force felt by the 64-kg occupant of the car? Express your answer to two significant figures and include the appropri
Yakvenalex [24]

Answer:

The force is -1.67\times10^{5}\ N

Explanation:

Given that,

Mass of car = 64 kg

Suppose,  a 1400-kg car that stops from 34 km/h on a distance of 1.7 cm.

We need to calculate the acceleration

Using formula of acceleration

v^2-u^2=2as

Where, v = final velocity

u = initial velocity

a = acceleration

s = distance

Put the value into the formula

0^2-(34\times\dfrac{5}{18})^2=2\times a\times 1.7\times10^{-2}

a=\dfrac{(34\times\dfrac{5}{18})^2}{2\times1.7\times10^{-2}}

a=-2623.45\ m/s²

We need to calculate the force

Using formula of force

F=ma

F=64\times(-2623.45)

F=-1.67\times10^{5}\ N

Negative sign shows the direction of the force is in the direction opposite to the initial velocity.

Hence, The force is -1.67\times10^{5}\ N

5 0
3 years ago
A string is stretched by two equal and opposite forces F newton each then the tension in sting is?
Arlecino [84]

Answer: The tension in the string is zero

Explanation:

3 0
3 years ago
We know that a ship, even though it is madeup of tonnes of iron, floats on water. How do you feel about the scientists who found
slamgirl [31]
I feel admiration and respect for them, and I feel grateful and humble.
3 0
3 years ago
How can you rewrite the force formula (f=ma) to solve the acceleration?​
dezoksy [38]
A=0.5 Nkg=0.5 kg⋅m/s2kg=0.5 m/s2
8 0
3 years ago
12. What type of circuit is the diagram below?<br> series circuit<br> parallel circuit
Dafna1 [17]

Answer:

parallel circuit

Explanation:

An electric circuit can be defined as an interconnection of electrical components which creates a path for the flow of electric charge (electrons) due to a driving voltage.

Generally, an electric circuit consists of electrical components such as resistors, capacitors, battery, transistors, switches, inductors, etc.

Basically, the components of an electric circuit can be connected or arranged in two forms and these includes;

I. Series circuit

II. Parallel circuit: it's an electrical circuit that has the same potential difference (voltage) across its terminals or ends. Thus, its components are connected within the same common points so that only a portion of current flows through each branch.

Hence, the type of circuit that the above diagram above represents is a parallel circuit.

7 0
2 years ago
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