All categories

3 years ago

Which of the following statement is not true about machines?

Physics

2 answers:

viva [34]3 years ago

4 0

The answer to this question is D or the last one

tester [92]3 years ago

4 0

The machine can affect the productivity in various ways.

The work done by a substance is is product of force and displacement.

Mathematically Work done W = FS where F is the force and S is the distance travelled.

The most significantly machine changes the direction of force which is required to carry out the required work.By doing so, the machines can lessen or increase the force needed for the work.We may say that the machines change the size of the force.

A machine can affect the work done by changing the way in which the work is done.The vice versa is not true.The machine can not decrease the amount of work that is done

Hence the correct option will be the last one i.e machines decrease the amount of work that is done.

You might be interested in

What unit is used for the value of G in Newton's Law of Universal<br> Gravitation?<br> *

Helga [31]

Answer:

In SI units, its value is approximately 6.674×10−11 m3⋅kg−1⋅s−2. The modern notation of Newton's law involving G was introduced in the 1890s by C. V. Boys. The first implicit measurement with an accuracy within about 1% is attributed to Henry Cavendish in a 1798 experiment.

Explanation:

please add me in the brainelist.

3 0

2 years ago

A(n) 60.3 g ball is dropped from a height of 53.7 cm above a spring of negligible mass. The ball compresses the spring to a maxi

Feliz [49]

Answer:

271.862 N/m

Explanation:

From Hook's Law,

mgh = 1/2ke²............... Equation 1

Where

m = mass of the ball, g = acceleration due to gravity, k = spring constant, e = extension, h = height fro which the ball was dropped.

Making k the subject of the equation,

k =2mgh/k²....................... Equation 2

Note: The potential energy of the ball is equal to the elastic potential energy of the spring.

Given: m = 60.3 g = 0.0603 kg, g = 9.8 m/s², e = 4.68317 cm = 0.0468317 m, h = 53.7 cm = 0.537 m

Substitute into equation 2

k = 2(0.0603)(9.8)(0.537)/0.048317²

k = 0.6346696/0.0023345

k = 271.862 N/m

7 0

3 years ago

Four complete waves pass the duck in one second the frequency of this wave is

galben [10]

The frequency of a wave is the number of complete oscillations passing a given point per second.

In this case, assuming the duck is stationary, we have 4 complete waves passing the duck in one second: therefore, the frequency of the wave is
$f= \frac{4}{1 s}=4 Hz$

3 0

3 years ago

**HELP ASAP**

Tcecarenko [31]

The answer of this question is B.

5 0

2 years ago

022 (part 1 of 4) 10.0 points A ball is thrown vertically upward with a speed of 24.5 m/s. How high does it rise? The accelerati

svetoff [14.1K]

Answer:

Part 1)

H = 30.6 m