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3 years ago

What is lever? state the principal of liver.

2 answers:

Colt1911 [192]3 years ago

5 0

A uniform lever at equal distances from the fulcrum counteract each other and establish a state of equilibrium, or balance, in the lever. ...

jonny [76]3 years ago

3 0

Rod shaped rigid bar which works by rotating freely on the fixed point is called lever
Hope it helps

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Yellow light travels through a certain glass block at a speed of 1.97 × 108 m/s. The wavelength of the light in this particular

Andre45 [30]

The frequency of the yellow light is $5.17\cdot 10^{14}Hz$

Explanation:

The relationship between wavelength, frequency and speed of a wave is given by the wave equation:

$v = f \lambda$

where

v is the speed of the wave

f is the frequency

$\lambda$ is the wavelength

For the yellow light in this problem, we have:

$v=1.97\cdot 10^8 m/s$ is the speed

$\lambda=3.81\cdot 10^{-7} m$ is the wavelength

Solving for f, we find its frequency:

$f=\frac{v}{\lambda}=\frac{1.97\cdot 10^8}{3.81\cdot 10^{-7}}=5.17\cdot 10^{14}Hz$

Learn more about frequency and waves:

brainly.com/question/5354733

brainly.com/question/9077368

#LearnwithBrainly

8 0

3 years ago

What is modulus of elasticity for shearing stress and strain called?

katrin2010 [14]

The shear modulus, or the modulus of rigidity, is derived from the torsion of a cylindrical test piece. It describes the material's response to shear stress. The shear modulus is one of several quantities for measuring the stiffness of materials and it arises in the generalized Hooke's law. ...

8 0

4 years ago

A ball with a mass of 0.5 kg is attached to one end of a light rod that is 0.5 m long. The other end of the rod is loosely pinne

prohojiy [21]

Answer:

The tension in the rod as the ball moves through the bottom circle is 9.8 N

Explanation:

When the ball is released from rest, the centripetal force equals the weight of the ball. So mv²/r = mg where m = mass of ball = 0.5 kg, v = speed of ball, r = radius of vertical circle = length of rod = 0.5 m and g = acceleration due to gravity = 9.8 m/s²

v = √gr = √9.8 m/s² × 0.5 m = √4.9 = 2.21 m/s

Now at the bottom of the circle T - mg = mv²/r where T = tension in the rod

T = m(g + v²/r)

= m(g + (√gr)²/r)

= m(g+ gr/r)

= m(g + g)

= 2mg

= 2 × 0.5 kg × 9.8 m/s²

= 9.8 N

So, the tension in the rod as the ball moves through the bottom circle is 9.8 N

8 0

4 years ago

A train is travelling towards the station on a straight track. It is a certain distance from the station when the engineer appli

AleksandrR [38]

Answer:

500 m

Explanation:

t = Time taken

u = Initial velocity = 50 m/s

v = Final velocity = 0

s = Displacement

a = Acceleration = -2.5 m/s²

Equation of motion

$v=u+at\\\Rightarrow 0=50-2.5\times t\\\Rightarrow \frac{-50}{-2.5}=t\\\Rightarrow t=20\ s$

Time taken by the train to stop is 20 seconds

$s=ut+\frac{1}{2}at^2\\\Rightarrow s=50\times 20+\frac{1}{2}\times -2.5\times 20^2\\\Rightarrow s=500\ m$

∴ The engineer applied the brakes 500 m from the station

4 0

3 years ago

A spring with k = 53 N/m hangs vertically next to a ruler. The end of the spring is next to the 18 cm mark on the ruler. If a 2.

Anarel [89]

Answer:

1.07 m

Explanation:

x = Compression of the spring

k = Spring constant = 53 N/m

Initial length = 18 cm

P = Kinetic energy

K = Kinetic energy

At the lowest point of the mass the energy conservation is as follows

$P_{ig}+P_{is}+K_i=P_{fg}+P_{fs}+K_f\\\Rightarrow mgx+0+0=mgx+\frac{1}{2}kx^2\\\Rightarrow x=\frac{2mg}{k}\\\Rightarrow x=\frac{2\times 2.4\times 9.81}{53}\\\Rightarrow x=0.89\ m$

At its lowest position the mark on the ruler will be

$x_f=0.18+0.89\\\Rightarrow x_f=1.07\ m$

The spring line will end up at 1.07 m

4 0

3 years ago

What is lever? state the principal of liver.​

What is lever? state the principal of liver.