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2 years ago

A tight knot can be easily opens by using a longer spanner. Give reasons

Physics

1 answer:

kobusy [5.1K]2 years ago

6 0

It is because the effort distance is greater than the load distance

Explanation:

As we know, Effort×effort distance = load × load distance

So when effort distance is increases,

The effort decreases

So when the spanner’s handle is long

A tight knot can easily be opened by less effrot

I hope it helped

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A ball is projected horizontally from the top of a hill with a velocity of 30m/s if it reaches the ground 5sec later the height

Vikki [24]

Answer:

The hill is a total of 150 meters tall

Explanation:

30×5=150

7 0

3 years ago

You place a 55.0 kg box on a track that makes an angle of 28.0 degrees with the horizontal. The coefficient of static friction b

Radda [10]

Answer:

$\theta=34 \textdegree$

Explanation:

From the question we are told that:

Mass $m=55kg$

Angle $\theta =28.0$

Coefficient of static friction $\alpha =0.680$

Generally, the equation for Newtons second Law is mathematically given by

For

$\sum_y=0$

$N=mgcos \theta$

for

$\sum_x=0$

$F_{s}=mgsin\theta$

Where

$F_{s}=\alpha*N\\\\F_{s}=\alpha*m*gcos \theta$

$F_{s}=0.68*55*9.8*cos 28$

$F_{s}=323.62N$

Therefore

$\alpha mgcos \theta=mg sin \theta$

$\theta=tan^{-1}(0.68)$

$\theta=34 \textdegree$

6 0

2 years ago

Will two separate 50db sounds together constitute a 100db sound explain mathematical

vfiekz [6]

Putting together two distinct 50 dB sound, do not create a 100 dB sound. Since decibels are logarithm of energy, creating two sounds together only makes the energy increase but the logarithm only goes up by somehow little. So increasing the sound by 10 dB, only makes it 10000 times louder because each 10 dB increase in sound makes the sound 10 times louder.

Twice as loud is an increase of 10Log (2) = 3.01 dB. So, 53,01 dB is twice as loud as 50dB.

5 0

3 years ago

A car with a mass of 1,500 kg is accelerating at a rate of

AURORKA [14]

Answer:

The net force acting on the car is

Newtons.

Hope this helps you

Explanation:

Force is defined as the product of the mass of the body and its aaceleration,

⇒

Substituting the above given values we get,

(

1500

)

(

2.0

)

3000

4 0

3 years ago

A pendulum with a mass of 250 g is released from its maximum displacement of 5 degrees and swings with a simple harmonic motion.

Amiraneli [1.4K]

L=T2xg/4x3.14^2
16x9.8/4x3.14^2
Used your calculator plz

3 0

3 years ago