Slam the brake pedal, the total pedal to the sinking feeling, just could not tread similar to what is wrong?

Loose brake a little abnormal sound when the brake pedal, especially when reversing what is the reason?

Where are the control for the Brakes to apply , that are attached to the main landing gear...
Also how do they steer A320 while on ground???

Bad vacuum booster or vacuum supply line/valve.

Learner drivers have to step on the brake when the clutch pedal it?

When the car in the end slope of emergency braking, the driver brake pedal feel soft, what is the main reason

What are some of the common problems that you come across when sharing the road with motorcyclists and car drivers?

Thanks.

What car ignition when the gas pedal with ah

My son will be 4 in a month. He's healthy and active and can't play soccer and baseball, so he's coordinated for his age. My father bought him a bike with training wheels for Christmas. Despite a lot of coaching on my part and a determination on his part (my son) he can't seem to pedal hard enough to get going. He keeps trying to pedal backwards. I've tried showing him the correct way, but he just can't seem to get it. His birtday is coming up and I thought I'd try to get him a different kind of ride on toy that he could learn to pedal on more easily. Any suggestions? Would a tricycle with a back be easier for him to learn to pedal on?

and mot's road tax insurance etc...thats it really

Chevy truck, Z71 silverado 1992.
When you hit the gas pedal, it does nothing but the engine works fine.

i have a bike where the pedal tightens and becomes immobile when i try to ride it...is this fixable? and how in the world do i fix it?