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3 years ago

In physics what do we use machines for

Physics

1 answer:

Tasya [4]3 years ago

7 0

Answer:

hope it helps for you

Explanation:

A machine is an object or mechanical device that receives an input amount of work and transfers the energy to an output amount of work. For an ideal machine, the input work and output work are always the same. The six common simple machines are the lever, wheel and axle, pulley, inclined plane, wedge, and screw.

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Which of the following processes have contributed to the evolution of the Earth over time?

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3 years ago

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4 years ago

A 320-g ball and a 400-g ball are attached to the two ends of a string that goes over a pulley with a radius of 8.7 cm. Because

Gnom [1K]

To solve this problem, it is necessary to apply the concepts related to force described in Newton's second law, so that

F = ma

Where,

m = mass

a = Acceleration (Gravitational acceleration when there is action over the object of the earth)

Torque, as we know, is the force applied at a certain distance, that is,

$\tau = F*d$

Where

F= Force

d = Distance

Our values are given as,

$m_1 = 0.32Kg$

$m_2 = 0.4Kg$

$d = 8.7*10^{-2}m$

Since the system is in equilibrium the difference of the torques is the result of the total Torque applied, that is to say

$\tau = T_2-T_1$

$\tau = F_2*d-F_1*d$

$\tau = m_2g*d-m_1*g*d$

$\tau = (m_2-m_1)g*d$

$\tau = (0.4-0.32)(9.8)(8.7*10^{-2})$

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8 0

3 years ago

Two automobiles of equal mass approach an intersection. One vehicle is traveling with velocity 12.0 m/s toward the east and the

Daniel [21]

Answer: 25.7m/s

Explanation: the cars have equal masses so we only consider their velocities,

The cars traveled together at 65° north of east this is with a velocity equal to the resultant velocity,

Using the force diagram as shown below;

Tan 65° = Vn/Ve

Ve is velocity of the car traveling east

Vn is velocity of car traveling north

Tan 65° = V2/12

2.144 = V2/12

V2 = 12 * 2.144

V2 = 25.7 m/s

5 0

3 years ago