Mechanics

A trolley can be used like a "cart" to move loads, but in the physics lab, we usually employ it in a dynamic capacity. By putting a trolley of a given mass on a runway, we can use it to study mechanics. The device used like this and called a dynamic trolley can weigh a few grams or hundreds of kilograms. Little ones sit on a bench in the physics lab. Have you seen those video clips on TV where a rolling sled slams into a vehicle in a crash test? That sled is a dynamic trolley. Its mass (and the distribution of that mass across its frame) are all calculated. It might look like a big weight on wheels, but it's much more than that.

Molecules are not part of a quark, quite the reverse.
Quarks are theoretical particles that make up, in various combinations, subatomic particles such as protons and neutrons.
Protons, neutrons and electrons make up atoms of elements in their various combinations.
Atoms of elements make up molecules in their various combinations.

The torque is the component of the weight that is perpendicular to the bar. So when the bar hangs vertically down, parallel to the force of gravity, there is no torque. If the bar makes an angle "A" with the vertical then the component of weight perpendicular to the bar would be mgSin(A) and the torque would be mgLSin(A) , where m= 1.21 kg, and L = 1.28m, g=9.8m/ss , so all you need is the angle "A".

ACTUALLY, stairs CAN'T go left to right. Unless you're watching Harry Potter, and feel that you live in Hogwarts. -3-

This question made me lol, so I have to answer it.

The bug is travelling in an assumedly perfect circle (the record), so the acceleration is directed toward the center of the record, as is the centripetal force

1 foot-pound is equivalent to: * 1.3558179483314004 newton meter (exactly) found at www.wikipedia.org

friction is a eorce of contact between two surfaces which opposes motion of objects over one another. In rolling friction the area in contact between two objects is comparatively less then that in case of sliding as in rolling, one object just roll over each other hence area of contact is less so force of rolling friction is less than sliding friction.

N o! the upthrust can not act at a distance because it acts on the centre of gravity of the object submerged in water in the opposite direction of weight.

it could be said that since potential energy (mgh) is lost at the exact rate kinetic energy (ke) is gained, that energy is translated into another form

since force applied (gravity) over time then impulse applied and increase of momentum

For circular motion to occur, there must be a centripetal force( a force that is always directed towards the centre of the circle).

The centripetal force is defined as F = mv2/r

Where F is the centripetal force, m is the mass of the orbiting body, v is the velocity of the body, and r is the distance to the centre of the circle.

If you whirl a conker above your head, the centripetal force is provided by the tension of the string. For a planet orbiting the sun, the centripetal force is provided by gravity.

Rain droplets can refract light. Different colours refract in different amounts so a spectrum is produced.

The decision to take it to a body shop for an oil change.

yes

modulation

1. force that moves a car forward is the friction force between the tires and the road (ignoring what is going on mechanically in the car)

2. if the car is travelling at constant velocity, net force is zero - forces pushing car forward are equal to forces pushing car back

stationary transverse waves

It is usually the car's engine doing work.

When the axial loads(Tensile/Compressive) will rise above the strength of specially designed socket , spigot and cotter. The failure may be of anyone component or together.

The materials that, in general, change sliding friction to fluid friction are called lubricants. This class of materials includes oil, grease and the like.

No, it's a 2nd class.

Light is almost a million times faster.

As an inclined plane gets shorter, the angle gets steeper and the effort becomes greater.

They are already free in the conduction band of metals, they are just not moving until forced to either by a battery or the magnetic field in a turning generator/alternator.

v = fλ

V/f = λ (wavelength)

V = 340ms-1

340/f = λ

In short you need to know the frequency of the particular sound wave to work out it's wavelength. once you know that you plug it into the above equation and you will get the wavelength of the wave.