What forces act on the rocket? (Hint: There are two.)jtwitty said:Also, how do i determine the net force
gravity and the mass of the object?Doc Al said:What forces act on the rocket? (Hint: There are two.)
Finding the net force is the first step before you can calculate the acceleration.
The force of gravity is one force. You're given the other. (Mass is not a force.)jtwitty said:gravity and the mass of the object?
Doc Al said:The force of gravity is one force. You're given the other. (Mass is not a force.)
doc al said:sounds good. So what's the net force?
Careful--You're missing a factor of a thousand!jtwitty said:1.18n??
edit: wait no, that's the accelaration. the net force is 18? idk :(
Doc Al said:Careful--You're missing a factor of a thousand!
Doc Al said:Try this: If you had 20 million dollars and you spent 10 million, how much would you have left? 10 dollars?
Exactly.jtwitty said:so would i have 18,000 as my netforce?
Not to find the net force. But yes to find the acceleration. That's the next step.but don't i divide, not subtract?
How did you get 11.8?jtwitty said:sorry i wrote it wrong, i mean 11.8
Doc Al said:How did you get 11.8?
Now you've got it.jtwitty said:a=[tex]\Sigma[/tex]f/m
a=
---- ok mid post i just realized i used the wrong number!
a=18,000/10,000
a=1.8??
Good! (What about the speed?)jtwitty said:yay
ok so i am using the d=1/2at2 formula
d=1/2(1.8)(202)
D=360?
No. Instead, consider the definition of acceleration.jtwitty said:d=vi/t?
360=vi/20
vi=7200?
(vi = initial velocity)
That would give you the average velocity as the rocket rises, not its velocity after 20 seconds.jtwitty said:wait is this rght
v = d/t
v = 360/20
v = 18!
Doc Al said:That would give you the average velocity as the rocket rises, not its velocity after 20 seconds.
Newton's 2nd Law of Motion states that the acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to its mass. This means that the larger the force applied to an object, the greater its acceleration will be. And conversely, the more massive an object is, the less it will accelerate for the same amount of force applied.
To apply Newton's 2nd Law, you must first identify all the forces acting on the object and their directions. Then, you can use the formula F=ma, where F is the net force, m is the mass of the object, and a is the acceleration. Plug in the known values and solve for the unknown quantity. It is important to make sure all units are consistent in your calculations.
Mass is a measure of the amount of matter in an object, while weight is a measure of the force of gravity acting on an object. Mass is measured in kilograms (kg), while weight is measured in newtons (N). On Earth, the weight of an object is directly proportional to its mass, but this may not be the case in other locations with different gravitational forces.
Newton's 2nd Law is one of the fundamental principles used in kinematics, which is the study of motion. By applying this law, we can calculate the acceleration of an object and use it to determine its velocity and position over time. Kinematics also takes into account the initial velocity and displacement of an object, in addition to the acceleration from Newton's 2nd Law.
Yes, Newton's 2nd Law is a universal law that can be applied to all types of motion, including linear, rotational, and projectile motion. As long as there is a net force acting on an object, its acceleration can be calculated and used to predict its motion. However, it should be noted that this law is most accurate for objects moving at speeds much slower than the speed of light.