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Question:

What mechanical motion principle do the brakes in a car or on a bicycle use?

A friction
explanation

When the brakes are applied, the brake pads rub on the wheel and the frictional force of this rubbing slows down the vehicle.

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Jonus Wang

2 years ago

Helped me a ton

ligiz

2 years ago

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Kieeikieei

2 years ago

Good help for the real test. I went in and took the practice test and there are similar questions on here that’s on the practice which is good.

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Related Questions

Which material is best suited for use as a boat anchor?

Metal

Foam and wood float and would therefore make poor boat anchors. Glass is not strong enough to be used as a boat anchor.

What is the point at which the lever pivots?

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The fulcrum of a lever is the support point on which the lever pivots, like the center point of a see-saw. A lever is a simple machine, meaning that it amplifies an input force to provide a greater output force. The fulcrum's position affects the type of lever and the mechanical advantage provided by it.

A farmer is attempting to pull a log with a line of rope attached to a tractor. Where should she watch for breakage on the rope?

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The tension on the rope nearest to the tractor is the greatest. This is because tension is greatest where the force is being applied.

15 J of work were expended moving an 18 kg block. At what velocity did the block move?

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To solve for velocity, you should use the formula W = KE, where Work = W, and Kinetic Energy = KE. This is because any work that is done to accelerate an object is converted to the kinetic energy of that object (the work-energy theorem). So, \(W= \frac{\mathrm{1} }{\mathrm{2} }m v^2 \). Plugging in the block's weight (18 kg) and the work done (15 J) will give you a velocity of 1.3 m/s.

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