We know, U = m * g * h
U = 4000 * 9.8 * 20
U = 784000 J
In short, Your Answer would be: 784000 J or 784 KJ
Hope this helps!
Answer:
Explanation:
Hi! It would be A. Plane mirrors produce only virtual images,and concave mirrors produce real and virtual images.
The main role of plasma is to take your nutrients, hormones, and protein to the cells that need it almost like a little grocery store that goes to your cells and drops of what they need
Plasma is also made up of 90% water 8%proteins and 2%hormones. Normally your blood should have 55% of it to be plasma unless your body is polycythemic or anemic.
Assuming the raindrop was stationary relative to the vertical distance to the ground at the start:
D=0.5at where d is distance, a is acceleration and t is time
D is 300 meters
a is 9.8 meter/sec squared
Solve for t in seconds
t = 61.2 seconds
v=at where v is velocity
a is 9.8 meters per second squared
t is 61.2 seconds
solve for v
v = 600 meters per second.
If it had an initial vertical velocity (v0) at the start :
d= 0.5at+v0t
and
v=at+v0
The coefficient of static friction of the block is 0.068.
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<h3>What is static friction?</h3>
This is the force between two bodies in contact and tends to oppose their motion. It is also the force that keeps two bodies at rest
To calculate the coefficient of static friction, we use the formula below.
Formula:
- F = mgμ............. Equation 1
Where:
- F = Horizontal force
- m = mass of the block
- g = acceleration due to gravity
- μ = coefficient of static friction.
Make μ the subject of the equation
- μ = F/mg.............. Equation 2
From the question,
Given:
- m = 3 kg
- g = 9.8 m/s²
- F = 2 N
Substitute these values into equation 2
- μ = 2/(3×9.8)
- μ = 2/29.4
- μ = 0.068.
Hence, The coefficient of static friction of the block is 0.068.
Learn more about static friction here: brainly.com/question/13680415
