Yes your weight will affect your speed. Due to higher force of friction, if you weigh more you will thus move slower. However, if your weight is due primarily to muscle, your extra muscle mass could compensate, or even over compensate for your weight, thus making you faster. If your weight is mostly due to fat or unnecessary baggage, that would certainly weigh you down. For example on a crew team, each member of the boat is responsible for pulling their own weight. If somebody weighs a lot and is going to slow down the boat, they better have more muscle and pull faster in order to compensate! you need less to pull so the more you weight the slower you go
Weight
Weight wouldn't effect speed but it would effect how quick it would get up to speed.
yes
The more weight the car has the slower it goes.
It would affect its speed because the weight of the car is gonna slow it down
The weight, aerodynamics, horse power and gear ratios all affect the speed of an automobile.
yes
Arrow dynamics
The speed of the bike has no effect on its weight. Weight = mass in kg x acceleration due to gravity, 9.8m/s2 on the earth.
As far as I know it shouldn't affect top speed (assuming that is the question). Weight will affect acceleration and therefore speed after a given amount of time or distance. An example would be 1/4 mile times at a race track. But top speed should be governed primarily by the wind resistance of the body, horsepower of the engine, and the overall gear ratio in top gear. Weight may affect rolling resistance slightly and therefore affect top speed but I suspect this affect would be negligible.
it cant run fast if it is fat
Yes. A heavier rocket will need more energy to achieve a certain speed.