3 years ago

What is one way that friction can be reduced?

2 answers:

8 0

Friction can be reduced by making the surface smoother, lubricating the surface, or reducing the contact between the forces.

Hope this helps!

VladimirAG [237]3 years ago

6 0

Making a smoother surface for the object to move on.

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A 10kg wagon is pulled along the floor with a force of 5N to the North.

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Answer:

50N

Explanation:

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3 years ago

A fidget spinner experiences a constant torque of 1.4 N.m. If the spinner is initially at rest, what is its angular momentum 2.0

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Answer:

$2.8N-msec$

Explanation:

We have given torque $\tau =1.4N-m$

Initial time $t_1=0\ sec$

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4 years ago

Substance a has a density of 3 g/cm3 and substance b has a density of 4 g/cm3. in order to obtain equal masses of these two subs

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3 years ago

A 75.0 kg ladder that is 3.00 m in length is placed against a wall at an angle theta. The center of gravity of the ladder is at

SOVA2 [1]

Answer:

The minimum angle the ladder makes with the horizontal for the ladder not to slip and fall is 45 degrees.

Explanation:

Given that,

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$f=\mu mg$

Using condition for torque as :

$mg\times 12\cos\theta-fl\sin (180-\theta)=0\\\\mg\times 1.2\cos\theta-\mu mgl\sin (180-\theta)=0\\\\\tan\theta=\dfrac{1.2}{\mu l}\\\\\tan\theta=\dfrac{1.2}{0.4\times 3}\\\\\tan\theta=1\\\\\theta=45^{\circ}$

So, the minimum angle the ladder makes with the horizontal for the ladder not to slip and fall is 45 degrees.

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3 years ago

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Explanation:

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3 years ago