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2 years ago

A tow truck exerts a force of 3000 N on a car, accelerating it at 2 m/s2. What is the mass of the car?

Physics

2 answers:

VARVARA [1.3K]2 years ago

5 0

The answer is <span>C. 3000 kg.</span>

Vlad1618 [11]2 years ago

5 0

Answer:

Mass, m = 1500 kg

Explanation:

Given that,

Force acting on the truck, F = 3000 N

Acceleration of the truck, $a=2\ m/s^2$

Let m is the mass of the truck. It can be calculated using second equation of motion as

F = m × a

$m=\dfrac{F}{a}$

$m=\dfrac{3000}{2}$

m = 1500 kg

So, the mass of the truck is 1500 kg. Hence, this is the required solution.

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A 35 kg child goes down a playground that is inclined at an angle of 27.5 degrees above the horizontal. Find the acceleration if

tigry1 [53]

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4.16m/s²

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$\sum Fx = ma_x\\Fm - Ff = ma_x\\W sin\theta - \mu R cos \theta = ma_x\\mg sin\theta - \mu mg cos\theta = ma_x\\$

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2 years ago

Planets are not uniform inside. Normally, they are densest at the center and have decreasing density outward toward the surface.

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Answer:

a = 9.94 m/s²

Explanation:

given,

density at center= 1.6 x 10⁴ kg/m³

density at the surface = 2100 Kg/m³

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$\rho(r) = ar^2 - br^3$

r is the radius of the spherical shell

dr is the thickness

volume of shell

$dV = 4 \pi r^2 dr$

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$dM = \rho(r)dV$

$\rho = \rho_0 - br$

now,

$dM = (\rho_0 - br)(4 \pi r^2)dr$

integrating both side

$M = \int_0^{R} (\rho_0 - br)(4 \pi r^2)dr$

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$M = \pi R^3(\dfrac{\rho_0}{3}+\rho)$

we know,

$a = \dfrac{GM}{R^2}$

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2 years ago

When was the last volcanic eruption in the world? what is the name of the volcano?

Vitek1552 [10]

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2 years ago