Physics, 12.07.2019 19:10, jones501324

Asewing machine needle moves in simple harmonic motion with a frequency of 2.5 hz and an amplitude of 1.27 cm. (a) how long does it take the tip of the needle to move from the highest point to the lowest point in its travel? (b) how long does it take the needle tip to travel a total distance of 11.43 cm?

Answers: 2

Show answers

Answers

The tip of the needle to move from the highest point to the lowest point in 0.4 sec and the needle tip to travel a total distance in 0.9 sec.

Explanation:

Given that,

Frequency = 2.5 Hz

Amplitude = 1.27 cm

(a). We need to calculate the time

The frequency is the reciprocal of the time.

$f=\dfrac{1}{T}$

$T=\dfrac{1}{f}$

$T=\dfrac{1}{2.5}$

$T=0.4\ sec$

The time taken from highest point to lowest point

$T'=\dfrac{T}{2}$

$T'=\dfrac{0.4}{2}$

$T'=0.2\ sec$

(b). We need to calculate the time

The time taken in one cycle = 0.4 sec

The distance covered in one sec= 4 times x amplitude

$d=4\times1.27$

$d=5.08\ m$

We need to calculate the speed

Using formula of speed

$v=\dfrac{5.08}{0.4}$

v=12.7

We need to calculate the time

$t=\dfrac{11.43}{12.7}$

t= 0.9 sec

Hence, The tip of the needle to move from the highest point to the lowest point in 0.4 sec and the needle tip to travel a total distance in 0.9 sec.

answered: Guest

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this

answered: Guest

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

Other questions on the subject: Physics

Physics, 21.06.2019 15:10, emilyphillips1681

Consider the following problem: a box with an open top is to be constructed from a square piece of cardboard, 3 ft wide, by cutting out a square from each of the four corners and bending up the sides. find the largest volume that such a box can have.

Answers: 3

continue

Physics, 22.06.2019 09:00, KillerSteamcar

A100 kg running back runs at 5m/s into a stationary linebacker. it takes 0.5 for the running back to be completely stopped

Answers: 3

continue

Physics, 22.06.2019 11:00, vanvalenpeyt

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space. b. we'll know it immediately because it will be brighter than the full moon in the sky. c. we won't know about it until 600 years from now. d. none of the above.

Answers: 3

continue

Physics, 22.06.2019 11:30, Gigglygoose4181

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? yourunits 3. a clothes dryer uses about 2 amps of current from a 240 volt line. how much power does it use? yourunits 4.

Answers: 1

continue

Do you know the correct answer?

Asewing machine needle moves in simple harmonic motion with a frequency of 2.5 hz and an amplitude o...