Answer:
See the explanation below.
Explanation:
This is because the vacuum chamber removes all the air contained and for this reason, there is no force that opposes the movement of the feather when falling. We must remember that the free fall equation of kinematics is not a function of the mass of an object.
where:
Vf = final velocity [m/s]
Vo = initial velocity [m/s]
g = gravity acceleration [m/s²]
t = time [s]
As we can see the mass of the object is not included in the equation.
The acceleration of the rock is the gravitational acceleration due to earth which is around 9.8 m/s^2. As the rock travels upwards it is working against the constant force of gravity and when it reaches the top it is the force of gravity that will cause a cause in the direction of the rocks velocity and cause it to accelerate towards earth. Using the equation a = F/m, the acceleration due to gravity exerts a force per unit mass on an object causing the object to accelerate, anything above earth surface will therefore have an external gravitational force action on it (in terms of projectile motion). So at the top of the rocks trajectory, the acceleration of the rock will be g (9.8) as a constant force is gravity is exerted on the rock throughout its path.
Answer:
120 watts
Explanation:
#1: 120 watts
#2: 667 watts
#3: 3 watts
#4: i forgot how to do this one
Answer : 
south
Explanation :
Given that,
Force = 200 N
Length = 2.00 m
Mass = 5.00 kg
We know that , the formula of the angular acceleration
We know the moment of inertia of rod
Now, the torque is
The angular acceleration
Negative sign represent of south direction.
Hence, this is the required solution.
