If the force constant of a spring is 25 newtons per meter and it has a mass of 0.45kg with an amplitude of 0.32m what is its maximum velocity?
The spring constant (K) is 25 N/M, Êthe maximum velocity is Êgiven ÊbyÊ AW where ÊA is Êthe amplitude (0.32 m) and w is given by the formula (k/m)^0.5. ÊTherefore the maximum velocity is Ê2.4 m/s (0.32 x (25/0.45)^0.5).
Constant velocity is the Newton's first law. A real life example is Sunlight, an example of constant velocity, light traveling at the constant speed of light.. On earth, an ice skater gliding or a hockey puck sliding on ice is a close example of nearly constant velocity. A stable oil drilling platform is close to zero constant velocity.
What is the number of newtons is the gravitational force minus the number of newtons for the drag in water?
Newton's 1st law states : No force, no acceleration. The key point is with no acceleration there is no change in velocity! If the body 's velocity is zero (at rest) then it stays at rest; if the velocity is constant it stays constant. Whatever the vecolicty is, with zero acceleration it stays that way. This is commonly called the Law of inertia. Inertia causes things to stay the same.
(standard air pressure and gravity) > (Constant) Force down (newtons) = mass * acceleration due to gravity > Say 70 kg skydiver @ 9.82 m/s/s = 70 * 9.82 = 687.4 newtons > Force up (newtons) = velocity 2 * drag coefficient (say 0.16 typical) > Terminal velocity (when forces balance) 687.4 = v 2 * 0.16 Terminal velocity = square root (687.4 / 0.16) = 65.546 metres per second ( 147 mph) terminal velocity
Why an object moves with uniform speed even if the two forces acting on it in opposite directions are equal?
According to Newtons 1st law of motion, a body moving with constant velocity will move with it until an external force compelled it to change its velocity or which is also known as the Inertia of motion. As two equal and opposite forces acting on it , the net external force is zero, so it will move with constant velocity.