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3 years ago

The current in the wires of a circuit is 180.0 milliAmps. If the

Physics

1 answer:

Virty [35]3 years ago

4 0

Explanation:

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La distancia entre dos ciudades es de 350km.Si un autocar emplea 4h en el viaje,determina su velocidad media y exprésala.En el s

Oxana [17]

Answer:

v = 87.5 km/h

Explanation:

To find the speed of the car you use the following formula:

$v=\frac{x}{t}$ (1)

x: distance traveled by the car = 350km

t: time = 4h

you replace the values of x and t in the equation (1):

$v=\frac{x}{t}=\frac{350km}{4h}=87.5\frac{km}{h}$

hence, the speed of the car is 87.5km/h

4 0

3 years ago

What's a good way to determine the net force of something

ollegr [7]

By adding up all the individual forces of the object

3 0

3 years ago

How much work is done by a car engine if the 1200kg car goes 13m up a hill and accelerates from 6 m/s to 7.5m/s?

kumpel [21]

The work done by the engine is equal to the gravitational potential energy (GPE) put into it. GPE = mgh
GPE = Work = 1200·9.81·13 = 153,036J

7 0

4 years ago

A steel ball with mass m is suspended from the ceiling at the bottom end of a light, 17.0-m-long rope. The ball swings back and

iogann1982 [59]

Answer:

1. 18.25 m/s

2. 0 m/s

Explanation:

1.So the centripetal acceleration of the ball at this lowest point must be, taking gravity into account

$a_c = \frac{T - mg}{m} = \frac{3mg - mg}{m} = 2g$

The speed at this point would then be

$v^2 = a_c r = 2gr = 2*9.8*17 = 333.2$

$v = \sqrt{333.2} = 18.25 m/s$

2. Similarly, if T = mg, then the centripetal acceleration must be

$a_c = \frac{T - mg}{m} = \frac{mg - mg}{m} = 0$

As the ball has no centripetal acceleration, its speed must also be 0 as well.

6 0

4 years ago

Three cars, car x, car y, and car z, begin accelerating from rest, at the same time. car x is more massive than car y, which is

grigory [225]

When the net force exerted on each car is identical. after 10 seconds, the amount of momentum is same for all cars.

<h3>What is impulse?</h3>

The change in momentum is equal to the product of impact force applied while colliding and time for that impact.

F. t = m (Vf -Vi)

where, Vf is the final velocity and Vi is the initial velocity.

For car X, Fx x t = Mx Vx

For car Y, Fy x t = My Vy

For car Z, Fz x t = Mz Vz

The force applied is same for all and the the time is also same equal to 10 seconds. The impulse is same for all the cars.

Thus, the three cars have same momentum.

Learn more about impulse.

brainly.com/question/16980676

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6 0

2 years ago