Yes, the extra weight of the couch will give it a greater maximum velocity, as well as rate of acceleration, on and off-piste.
Longer and wider skis means a greater area of contact with the snow, causing greater acceleration: Provided the skis are reasonably waxed/ prepared. If the ski bases are dried out, they may actually slow you down, since a dry ski base will have a braking, friction effect.
No lighter things do not fall faster than heavier things. In a vacuum they will fall at the same speed. Normally the heavier thing will fall down faster because of its weight. Sometimes the lighter thing falls faster depending on the air resistance.
Heavier objects have more gravitational pull on them
The answer depends on the force applied to the bodies.
It depends on the lorry, if it's heavier or carrying heavier things then it will have to travel slower. If it's lighter or carrying lighter things then it can travel faster.
Yes, because the Friesian is lighter and the Clydesdale is heavier.
yes because of the heaviness its speed increases more than lighter stuff
Heavier stars will usually burn faster than lighter stars.
The lighter the dragster is for its horsepower, the faster it will go. This is why the front frames and tires are so relatively flimsy.
The lighter strings vibrate much faster than the heavier ones when the bow is drawn across them. This faster or higher frequency of vibration emits the higher pitched sound.
Assuming the parachutes are the same size, then yes.
It can be hotter (and so be moving faster) F=ma
because the heavier person has more initeria and therefore the forces that would slow the slider down i.e friction, wind resistance, whatever, have less effect on a heavier person that a lighter person