It should be noted that in most cases a sailboat does not plane, thus it is actually limited to a speed which is dictated by the length of it's hull at the water line. So to calculate the maximum speed you would need the length of the hull at the water line. Then you would use the following formula:
VHULL = 1.34 x LWL1/2 knots
This is a basic one dimensional kinematics problem which can be solved using kinematics equations. For t=time v=final velocity o=original velocity, x=position (change of position) and a=acceleration, the following equations hold true:
v=o+at
x=(.5)(v-o)t
x=(o*t)+(.5)at^2
This [problem can be solved using the first equation.
From the problem:
v=unknown
o=5 m/s
a=4 m/s^2
t=10
Plug into the formula:
v=(5m/s) + (4m/s^2)(10s)
The solution is 45 m/s. (which would be a hell of a scary ride in a sailboat in my humble opinion)
Hope this halps
positive acceleration helps to increase the velocity for positive direction while negative acceleration resists the motion.
It goes backwards instead of forwards.
Acceleration of a mousetrap vehicle occurs because potential energy in the tensed spring is converted to kinetic energy (energy of motion) as the spring relaxes. There are two basic forms of mousetrap vehicle, those which release the spring suddenly, and those which release it gradually. Those that release the spring suddenly generally have the quickly moving spring impact an object, commonly the track, which accelerates the vehicle forwards. Those that release the spring gradually often use the spring energy to cause drive wheels to turn, which also accelerates the vehicle.
Yes, it just depends on how you define which way is "positive". If you define the "backwards" direction to be the positive direction, acceleration will be positive when going "backwards". Note that if we define the axes like this, going "forwards" will give the car a negative acceleration.
vertical
hill, drop, fall Think of any five different things (car, train, runner, fly, bird) slowing down as they continue traveling forwards. The direction of motion is shown by the velocity vector. The acceleration in each case is in the opposite direction.
forwards
forwards dude i was a forward myslef :P
8
you rock forwards then backwards straight after yourock forwards.
Gravity affect people on 6 axis. They are positive or negative x (lateral G's), positive or negative y (vertical G's), and positive or negative z (acceleration G's). Vertical G's When on a traditional coaster (rider is sitting in an upright facing forwards), vertical G's act on the rider up and down. When vertical G's are positive, they make the rider feel like he/she is being pushed into his/her seat. When negative vertical G's are present, they make the rider feel weightless, or even give people that "Stomach in your throat" feeling. Lateral G's When on a traditional coaster (rider is sitting in an upright position facing forwards), lateral G's act on the rider left and right. Positive lateral G's make the rider feel like he/she is being pushed to the right, and negative lateral G's make the rider feel like he/she is being pushed to the left. Acceleration G's When on a traditional coaster (rider is sitting in an upright position facing forwards), acceleration G's act on the rider forward and backwards. Positive acceleration G's make the rider feel like he/she is being pushed forwards (like quickly speeding up in a car; mainly felt on roller coasters with launches). Negative acceleration G's make the rider feel like he/she is being pulled backwards (mainly felt on the brakes of a roller coaster when decelerating)
forwards