Arthur conducts a controlled experiment several times. The results of each test show that his hypothesis is not supported. Which
1 answer:
You might be interested in
As we know that block of steel is continue to be in moving state
so here the friction must be kinetic friction between two surface
so we know that formula of kinetic friction must be
now we have
now from the above equation we have
So here we need atleast 14.25 N force to continue sliding the box now as per given options all forces which are less than 14.25 N is not correct
Hence correct answer must be 18.0 N
<u>D) 18.0 N</u>
Answer:
The illumination on the book before the lamp is moved is 9 times the illumination after the lamp is moved.
Explanation:
The distance of the book before the lamp is moved,
The distance of the book after the lamp is moved,
Illumination can be given by the formula,
Illumination before the lamp is moved,
Illumination after the lamp is moved,
The illumination on the book before the lamp is moved is 9 times the illumination after the lamp is moved.
Answer:
The normal force acting on the block is 980 N.
Explanation:
Mass of box = 100 kg
Coefficient of static friction = 0.40
Coefficient of kinetic friction = 0.20
We need to calculate the normal force
We know that,
When the object is placed on the flat surface then the normal force is equal to the weight of the object.
So. The normal force = mass x acceleration due to gravity
Where, N = Normal force
m = mass of object
g = acceleration due to gravity
Hence, The normal force acting on the block is 980 N.