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Marina86 [1]
2 years ago
6

What is a Lever?

Physics
2 answers:
NemiM [27]2 years ago
8 0
Lever: a bar used to move something
Wedge: a tool used to go in between object to put them in place
Incline plane : a ramp it’s used to help rise heavy things
Pulley: it’s a wheel that supports movement and change of direction
Mariulka [41]2 years ago
4 0

Answer:lever

Explanation:

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When a sacred item or symbol is removed from its special place or is duplicated in mass quantities, then it becomes profane as a
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It becomes profane as a result of desacralization

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2. A mixture of mercury and copper is an example of
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b

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Pressure in a liquid increases with its ..........​
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If the coefficient of kinetic friction between tires and dry pavement is 0.84, what is the shortest distance in which you can st
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Answer:

The shortest distance in which you can stop the automobile by locking the brakes is 53.64 m

Explanation:

Given;

coefficient of kinetic friction, μ = 0.84

speed of the automobile, u = 29.0 m/s

To determine the  the shortest distance in which you can stop an automobile by locking the brakes, we apply the following equation;

v² = u² + 2ax

where;

v is the final velocity

u is the initial velocity

a is the acceleration

x is the shortest distance

First we determine a;

From Newton's second law of motion

∑F = ma

F is the kinetic friction that opposes the motion of the car

-Fk = ma

but, -Fk = -μN

-μN = ma

-μmg = ma

-μg = a

- 0.8 x 9.8 = a

-7.84 m/s² = a

Now, substitute in the value of a in the equation above

v² = u² + 2ax

when the automobile stops, the final velocity, v = 0

0 = 29² + 2(-7.84)x

0 = 841 - 15.68x

15.68x = 841

x = 841 / 15.68

x = 53.64 m

Thus, the shortest distance in which you can stop the automobile by locking the brakes is 53.64 m

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Ice is placed in hot water. What happens to the temperature of the ice and the water?
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