We know that by Hooke's Law,
F = kx; where F is the net force on the spring, k is the spring constant and x is the extension.
We are told that all the springs have the same spring constant as the first, so we first calculate its spring constant.
F = ma = 4.1 × 9.81
= 40.2 Newtons
k = 40.2 ÷ 0.13
k = 309 Newtons / m
Now, for the spring under consideration, the mass is
m2 = 12.3 kg
The net force will be the difference of the downward force of the mass's weight and the upward force of the elevator. Thus,
F = 12.3 × 9.81 - 12.3 × 4.2
F = 69 Newtons
x = 69 ÷ 309
x = 0.22 m = 22 cm
Answer:
Explanation:
Given:
radius of capillary, 
angle of contact, 
density of water, 
surface tension of water, 
height, h = ?
We have the equation for the height of meniscus as:
No, the capillary action alone cannot be the mechanism of water transportation to the top of the trees. Transpiration also creates a suction pressure in the xylem complementary to the ascent of sap and cohesion of water being the other causes of movement of water up in the plants.
Explanation:
Average acceleration is the change in velocity over the change in time:
a = (v − v₀) / t
In the x direction:
aₓ = (6.11 cos (-54.2°) − 5.33 cos (37.9°)) / 2.00
aₓ = -0.316 m/s²
In the y direction:
aᵧ = (6.11 sin (-54.2°) − 5.33 sin (37.9°)) / 2.00
aᵧ = -4.11 m/s²
It might be to late but the answer is C
Average speed=total distance travelled/time
