Ask question

Ask question

All categories

3 years ago

7

You are pushing a 30-kg block on a rough floor in a direction that is parallel to the floor. The block moves with a uniform 2 m/

s velocity. If your normal force on the block is 200 N, what is the magnitude of the friction force?

1 answer:

kykrilka [37]3 years ago

3 0

Answer:dd

Explanation:

I dunno

You might be interested in

In certain ranges of a piano keyboard, more than one string is tuned to the same note to provide extra loudness. For example, th

Georgia [21]

Explanation:

Given that,

Frequency in the string, f = 110 Hz

Tension, T = 602 N

Tension, T' = 564 N

We know that frequency in a string is given by :

$f=\dfrac{1}{2L}\sqrt{\dfrac{T}{m/L}}$ , T is the tension in the string

i.e.

$f\propto\sqrt{T}$

$\dfrac{f}{f'}=\sqrt{\dfrac{T}{T'}}$ , f' is the another frequency

${f'}=f\times \sqrt{\dfrac{T'}{T}}$

${f'}=110\times \sqrt{\dfrac{564}{602}}$

f' =106.47 Hz

We need to find the beat frequency when the hammer strikes the two strings simultaneously. The difference in frequency is called its beat frequency as :

$f_b=|f-f'|$

$f_b=|110-106.47|$

$f_b=3.53\ beats/s$

So, the beat frequency when the hammer strikes the two strings simultaneously is 3.53 beats per second.

8 0

3 years ago

A car traveling comes to a stop at a red light.How many forces are taking place?

charle [14.2K]

i think it depends on the speed rate

6 0

3 years ago

Unlike metals, many nonmetals are.......

timofeeve [1]

The correct is b: malleable and ductile.

7 0

3 years ago

Which of the following objects works by burning fuel to push hot air toward the ground and create thrust to use in lifting off?

olga_2 [115]

Rockets, space stations, space probe

6 0

4 years ago

Read 2 more answers

Explain the equations given in the Michelson-Morley experiment.

Naya [18.7K]

Michelson-Morley experiment, an attempt to detect the velocity of Earth with respect to the hypothetical luminiferous ether, a medium in space proposed to carry light waves. First performed in Germany in 1880–81 by the physicist A.A. Michelson, the test was later refined in 1887 by Michelson and Edward

3 0

3 years ago

Read 2 more answers