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when breaks are applied for moving car whose velocity will be decreases and finally car will be at rest position

acceleration = (final velocity - initial velocity)/time taken

= (0-u)/t

= -(u/t)

negative acceleration is called deceleration

deceleration = - acceleration

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11y ago
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Force applied * Pedal ratio = Effective force

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Q: How do you calculate brake pedal force and deceleration?
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Three devices that control the speed and direction of your vehicle are the?

gearshift, brake pedal, and steering wheel.


Why is it dangerous to let air get into brake pipes?

Air is easily compressed and the amount of fluid that must be pushed into the brake lines to transmit the force to the brakes increases greatly when air is present. Normally, the brake is activated by the brake pedal connected to the master cylinder. The master cylinder has a small piston that moves when you press on the brake pedal and that piston pushes brake fluid out of the cylinder and into the brake lines which ultimately causes brake fluid to flow to the wheel cylinders which them move and provide the force to press the brake pad against the disc or brake drum connected to the wheel. When there is air in the brake lines, the master cylinder pushed more fluid in than the amount of fluid that comes out at the wheel cylinders. This is because the air in the brake line is being compressed where in the normal situation there is essentially no compression of the brake fluid. Thus, to apply the same amount of force to the brake pads, the piston in the master cylinder has to move further. If there is a lot of air, then the piston has to move much further. If there is truly a large amount of air, then the piston in the master cylinder may move through its entire allowed distance and still not provide enough pressure to adequately press the brake pad against the frictional surface connected to the wheel. Three things to notice that decrease braking effectiveness and hence are dangerous. 1. Air in the lines gets compressed so that the amount of force creating friction at the wheels is less when compared to the same amount of mechanical movement of the brake mechanism. 2. The maximum amount of braking force is limited if the amount of air allows the piston in the master cylinder to travel its full length. 3. If you have air in the lines, it may be caused by a leak and more air may enter and further decrease braking effectiveness. Air in brake lines is usually a simple problem and easy to correct by "bleeding" the brakes.


Changed pads rotors calipers brake hoses bled lines am getting fluid to the brakes there are no leaks brake pedal is stiff when engine is off but it loosens when engine starts no brakes why is this?

the master cylinder is whats bad


What is the principle of hydraulic brake system?

PRINCIPLES OF HYDRAULIC PRESSURE A Frenchman named Pascal discovered that a pressure applied to any part of a confined fluid transmits to every other part with no loss. The pressure acts with equal force on all equal areas of the confining walls and perpendicular to the walls. Remember when you are talking about the hydraulic machine, you are talking about the way a liquid acts in a closed system of pipes and cylinders. The action of a liquid under such conditions is somewhat different from its behavior in open containers or in lakes, rivers, or oceans. You also should keep in mind that you cannot compress most liquids into a smaller space. Liquids don't "give" the way air does when you apply pressure, nor do liquids expand when you remove pressure. Punch a hole in a tube of toothpaste. If you push down at any point on the tube, the toothpaste comes out of the hole. Your force has transmitted from one place to another through the toothpaste, which is a thick, liquid fluid. Figure 10-5 shows what would happen if you punched four holes in the tube. If you were to press on the tube at one point, the toothpaste would come out of all four holes. You have illustrated a basic principle of hydraulic machines. That is, a force applied on a liquid transmits equally in every direction to all parts of the container. We use this principle in the operation of four-wheel hydraulic automobile brakes. Figure 10-6 is a simplified drawing of this brake system. You push down on the brake pedal and force the piston in the master cylinder against the fluid in that cylinder. This push sets up a pressure on the fluid as your finger did on the toothpaste in the tube. The pressure on the fluid in the master cylinder transmits through the lines to the brake cylinders in each wheel. This fluid under pressure Figure 10-6.-Hydraulic brakes. Figure 10-7.-Liquid transmits force. pushes against the pistons in each of the brake cylinders and forces the brake shoes out against the drums. MECHANICAL ADVANTAGES OF HYDRAULIC PRESSURE Another aspect to understand about hydraulic machines is the relationship between the force you apply and the result you get. Figure 10-7 will help you understand this principle. The U-shaped tube has a cross-sectional area of 1 square inch. In each arm is a piston that fits snugly, but can move up and down. If you place a 1-pound weight on one piston, the other one will push out the top of its arm immediately.The master cylinder is where the brake fluid starts.The pedal is attached to the master cylinder plunger. When the pedal is depressedit pushed the plunger which pushes the brake fluid down the brake lines.the brake lines are connected to the slave cylinders. when the brake fluid reaches the slave cylinders it presses out a piston to which is attached a brake pad. The brake pad then clamps against the rotor.All air must be bled from the system. (Air is compressible and if you have any in the system you will have a soft pedal.)As oil is virtually uncompressable it works as a solid link from pedal to brake.hudraulic brake system is a composition master cylinder,caliper cylinder,resorvoir,high pressure pipe lines brake pads etc.while applying brake pedal the hydaraulic pressure comes through reservoir to mastercylinder to primary cup(including piston) and pressure goes to the caliper cylinder primary piston and thus barke pads grabs the disc and thier is heavy heat energy builds,finally stops the wheel.during releasing the br pedal the hydraulic pressure line returns through 2dary cup(including piston),returning the brake oil to the reservoir and thus releasing the brake


What is differences between mechanical and hydraulic brakes?

mechanical and hydraulic are two different power transmission medium. in mechanical brakes solid links or levers are used to achieve the required braking. in hydraulic brakes there are no links, here the braking is achieved by the hydraulic fluid, the hydraulic system in which the force applied at the brake pedal is multiplied several times to achieve the requied braking.

Related questions

What does the brake pedal assembly uses a mechanical lever for?

Increase the driver's force on the brake pedal applied to the master cylinder


What force opposes the motion of your car when your step on the brake pedal?

Friction.


Does a car's brake system multiply the force of the driver's tap on the brake pedal?

Yes. Most cars have a hydraulic braking system that uses a vacuum servo (or booster). It is a mechanical device between the brake pedal and the master cylinder piston. The booster uses the engine's manifold vacuum to amplify the force applied from the brake pedal.


True or false a car's brake system multiplies the force of the driver's tap on the brake pedal?

true!


Why is it important to check your brake fluid?

Your brake fluid is how the brake system converts mechanical force of your foot on the brake pedal, into hydraulic force that applies your brakes. Without fluid, your hydraulic brakes will not function.


Is it true that a car's break system multiples the force of the driver's tap on the brake pedal?

Yes.


Where is the switch under the brake pedal you cant find it?

It is above the brake pedal not under it. Follow the brake pedal bracket all the way up and you will see the brake pedal switch.


What is the differentiate of acceleration and deceleration?

The only difference is in the direction. Acceleration is when you increase your speed, deceleration is when you decrease your speed. Like pressing a gas pedal or brake in a car. In more technical terms, acceleration is parallel to and in the direction of velocity whereas deceleration is parallel and opposite to velocity. In any case, you can always call deceleration "Acceleration in the opposite direction of motion" In physics, both are just called "acceleration".


Where is the brake light switch on a 93 Dakota?

Just above the brake pedal, on the mounting bracket that the pedal pivots on.Just above the brake pedal, on the mounting bracket that the pedal pivots on.


Where is the Emergency brake pedal on a 1966 Thunderbird?

to the left of the brake pedal


How do you brake down the number 32?

Take your foot off the gas and move it to the pedal on its side - the brake pedal.Take your foot off the gas and move it to the pedal on its side - the brake pedal.Take your foot off the gas and move it to the pedal on its side - the brake pedal.Take your foot off the gas and move it to the pedal on its side - the brake pedal.


What is meant by brake pedal pads?

It would be the rubber pad that sits on your brake pedal. Unless they were referring to brake pads, which are the pads which enables your vehicle to stop by pressing the brake pedal.