Answer:
The force is 274 N.
Explanation:
In figure 2:
(d) Let the tension in the string is T.
According to the Newton's second law,
Net force = mass x acceleration
Apply for 200N.
Now put in (1)
T - 114.7 = 20.4 x 7.81
T = 274 N
Answer: 2.5N
Explanation:
Given the following :
Mass of block (m) = 2kg
Coefficient of static friction (μs) = 0.4
Horizontal force applied to the block = 2.5N
The frictional force (Ff) between the block and the floor is :
First calculate the maximum static frictional force:
Frictional force = Coefficient of static friction(μs) × normal reaction(R)
Normal reaction(R) = mass × acceleration due to gravity (10m/s^2)
R = 2 × 10 = 20
Fmax = μs × R
Fmax = 0.4 x 20 = 8N
Here, since the applied force (2.5N) is less than maximum frictional force(8N).
The force of friction between the block and the floor will be equal to the applied force of 2.5N due its ability to adjust itself in other to ensure equilibrium.
The Correct Answer is <u>D.Infrared/</u> <em>INFARED has a lower frequency than visible light/</em>
It will eventually wear down the rock due to hydraulic action and etc