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3 years ago

A 438kg car is accelerating east at 2.55m/s^2. What is the total force acting east on the car

Physics

1 answer:

lisabon 2012 [21]3 years ago

5 0

Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 438 × 2.55

We have the final answer as

Hope this helps you

You might be interested in

A myopic person has a far point of 1.000m. If she wears her eyeglass 2.0cm in fromt of here eyes, what is the power of her eye g

Iteru [2.4K]

Answer:

51 dioptre

Explanation:

u = Object distance = 2 cm

v = Image distance = 1 m

f = Focal length

Lens Equation

$\frac{1}{f}=\frac{1}{u}+\frac{1}{v}\\\Rightarrow \frac{1}{f}=\frac{1}{0.02}+\frac{1}{1}\\\Rightarrow \frac{1}{f}=\frac{1.02}{0.02}\\\Rightarrow \frac{1}{f}=51\\\Rightarrow f=\frac{1}{51}$

Power of lens

$P=\frac{1}{f}\\\Rightarrow P=\frac{1}{\frac{1}{51}}\\\Rightarrow P=51\ D$

Power of the eye lens is 51 dioptre.

5 0

3 years ago

At some airports there are speed ramps to help passengers get from one place to another. A speed ramp is a moving conveyor belt

Amanda [17]

Answer:

The time taken is $t_s = 31.16 s$

Explanation:

From the question we are told that

The length of the speed ramp is $L = 104m$

The speed of the speed ramp is $v_r = 2.1 m/s$

The time taken to cover the distance is $t = 84 s$

The walking speed( when not on the speed ramp) required to cover the 104m is mathematically represented as

$v_w = \frac{L}{t}$

Substituting values

$v_w = \frac{104}{84}$

$= 1.238 m/s$

The speed required to cover the 104m distance when on a speed speed ramp is mathematically represented as

$v = The\ walking\ speed + speed \ of \ the \ speed \ ramp$

substituting values

$v = 2.1 + 1.238$

$v = 3.338 m/s$

Now the time taken to travel the 104m distance when walking on the speed ramp is mathematically evaluated as

$t_s = \frac{L}{v}$

$= \frac{104}{3.338}$

$t_s = 31.16 s$

4 0

3 years ago

Read 2 more answers

Tafu is working with subatomic particles in the physics lab. a positron is traveling in a straight line down the particle accele

KatRina [158]

Answer:

Infinity

Explanation:

When you have a limit approaching infinity one method you can use is to remember that the highest power dominants all of the other ones so when we have (t^2)/t-1 like in your problem, we see that t^2 has the highest power of 2 so if that's going to infinity and it's not being divided by any powers higher than it will just be inifinity.

4 0

3 years ago

Find the mass if the force is 18 N and the acceleration is 2 m/s2.

Flura [38]

Answer:

<h3>The answer is 9 kg</h3>

Explanation:

To find the mass given the force and acceleration we use the formula

$m = \frac{f}{a} \\$

where

f is the force

a is the acceleration

We have

f = 18 N

a = 2 m/s²

We have

$m = \frac{18}{2} \\$

We have the final answer as

Hope this helps you

4 0

3 years ago

Transformers: an ideal step-up transformer doubles a primary voltage of 110 v. what is the ratio of the number of turns in its p

Bogdan [553]

The ratio of the number of turns in the primary and the secondary coil of a step-up transformer is 1 : 200.

The formula for calculating the secondary voltage in a transformer is: N = V = Where No and N are the primary and secondary coils' respective turn counts; V and V are the RMS voltages across the primary and secondary coils, and I and Is are the primary and secondary currents.

Calculation: Due to this:

The coil's N2 to Ns turn ratio is 1/20.

We understand that N=1/20 = 4/LP: Is = 20:1.

The transformer uses the following principles: A wire's magnetic field moves as a result of a changing current flowing through it. A wire exposed to a moving magnetic field will create a changing current.One of the coils produces a magnetic field that grows and contracts in response to the changing voltage of the AC when an AC source is connected to it.

In other words, the coil generates a growing magnetic field as the voltage across it rises. The magnetic field generated around the capacitor increases when the voltage reaches its maximum and starts to decline.

learn more about Transformers: brainly.com/question/14184068

#SPJ4

6 0

2 years ago