Hi there!
Recall Newton's Second Law:
∑F = Net force (N)
m = mass (kg)
a = acceleration (m/s²)
We are already given the mass and acceleration, so we can plug these values into the equation:
∑F = 1600 · 4.5 = 7200 N
<h2>Because kinetic energy is proportional to the velocity squared, increases in velocity will have an exponentially greater effect on translational kinetic energy. Doubling the mass of an object will only double its kinetic energy, but doubling the velocity of the object will quadruple its velocity.</h2>
Answer:
Mercury is commonly used in barometers because its high density means the height of the column can be a reasonable size to measure atmospheric pressure.
Answer:
21813.46 J
Explanation:
The Potential energy stored at the time it is hanging freely is mgl.
the potential energy stored at the time when it makes a angle 23 degree from the vertical is mglCos 23
Change in gravitational potential energy
U = mgl = mgl cos 23
U = mgl (1 - cos23)
U = 1400 x 9.8 x 20 ( 1 - Cos 23)
U = 21813.46 J