- #1
jelzap
- 4
- 0
Homework Statement
An 18kg rock is released under water.
The fricitional Buyoyance add up to 129N
How long will it take to fall 1.0m
Hi jelzap.jelzap said:Homework Statement
An 18kg rock is released under water.
The fricitional Buyoyance add up to 129N
How long will it take to fall 1.0m
Homework Equations
You should have something here!
The Attempt at a Solution
... and here.
jelzap said:well, i found the acceleration of the rock, i need to know what to do from there
M(A)=Fnety
M(A)= Fa+ Ff
M(a)=-(18*9.8) + 129N
18a=(-176.4)+129
a=47.4 (what are the units here?)
What do i do from here?
Newton's Laws of Motion are a set of three physical laws that describe the relationship between an object's motion and the forces acting on it. The first law states that an object at rest will remain at rest and an object in motion will remain in motion at a constant velocity unless acted upon by an external force. The second law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. The third law states that every action has an equal and opposite reaction.
Static friction is the force that prevents two surfaces from sliding past each other when there is no relative motion between them. It is typically greater than dynamic friction, which is the force that resists the motion of two surfaces that are already in contact and sliding past each other.
Air resistance, also known as drag, can affect the trajectory of a projectile by slowing it down due to the force exerted by the air molecules on the object. This results in a curved path, known as a parabola, rather than a straight line. The amount of air resistance depends on the speed, size, and shape of the projectile.
Speed is a measure of how fast an object is moving, while velocity is a measure of both speed and direction. This means that an object can have a constant speed but varying velocity if its direction of motion changes. Velocity is a vector quantity, while speed is a scalar quantity.
Mass is a measure of the amount of matter in an object. According to Newton's Second Law, the greater the mass of an object, the more force is needed to accelerate it. This means that an object with a larger mass will have a slower acceleration compared to an object with a smaller mass when acted upon by the same force.