2 years ago

If you push a box across a horizontal floor towards the south, in which direction will friction act?

Physics

1 answer:

MrRissso [65]2 years ago

3 0

Answer: North

Explanation: I believe the friction will go the opposite way of the object being pushed.

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3 years ago

You are a project manager for a manufacturing company. One of the machine parts on the assembly line is a thin, uniform rod that

ra1l [238]

Answer:

a) $I=0.012\ kg.m^2$

b) $I=0.012\ kg.m^2$

Explanation:

Given that:

mass of rod, $m=0.4\ kg$

length of the rod, $l=0.6\ kg$

(a)

Moment of inertia of rod about its center and perpendicular to the rod is given as:

$I=\frac{1}{12} m.l^2$

$I=\frac{1}{12} 0.4\times 0.6^2$

$I=0.012\ kg.m^2$

(b)

Moment of inertia on bending the rod to V-shape of 60 degree angle and axis being perpendicular to the plane of V at the vertex.

We treat it as two rod with axis of rotation at the end and perpendicular to the plane of rotation. 

So, the mass and the length of the rod will become half of initial value.

$I=I_1+I_2$

$I=\frac{1}{3} \frac{m}{2} (\frac{l}{2})^2 +\frac{1}{3} \frac{m}{2} (\frac{l}{2})^2$

$I=2[ \frac{1}{3}\times 0.2\times 0.3^2]$

$I=0.012\ kg.m^2$

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3 years ago

PE:

ella [17]

Answer:

The answers are:

T, T, F, F, T, T, F, F, T, T, F

Good luck!

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3 years ago

What is the youngest to oldest mesozoic era, precambrian time, cenozoic era, paleozoic era

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Oldest to youngest *Precambrian Era*Paleozoic *Mesozoic*Cenozoic

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4 years ago

A truck is moving 14m/s to the south. If it takes the truck 20 seconds to reduce its velocity to 10m/s south. What is is acceler

WARRIOR [948]

Answer:

-0,2 m/s²

Explanation:

Acceleration = α = (V-V₀)/t

α = (10-14)/20 = -0,2 m/s²

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3 years ago