Answer:
Explanation:
Gravity is force of attraction between bodies that have masses. It is one of the most importance force in the universe that keeps it in an ordered form.
From what is obtainable from newtons law of universal gravitation, which states that "the gravitational force between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between them";
we know that;
- Gravity is a force of attraction that pulls objects toward the earth's center.
- It increases with mass between two objects
- It decreases as the distance increases
The circular groove is provided in a saucer for placing the tea only to prevent the cup from falling over in the case of sudden shocks. Other reason could be to provide support to the cup, or else the cup will fall when we change our direction due to Inertia of Direction.
Hi there! When a shadow is at its shortest is at noon when the sun is overhead.
Answer:
p= 400.29N
........the horizontal force
Explanation:
Given data
mass=25 kg
small cube mass mass=4 kg
Us (The Coefficient of static b/w two cubes) = 0.71
to find
The horizontal force to keep the small cube from sliding downward
Solution
F=ma.........................from Newton Second law
Where F=force
a=acceleration
m=mass
we can write equation in form of acceleration
a=F/m
The acceleration on small box is same as that on the large box.
Let P be force to find.
then:
a=p/(25kg+4kg)
a=p/(29kg)m/s²
The force acting on small box:
F=ma
f=4*(p/29)N........................normal force
friction force= Us*(normal force).........where Us is coefficient of static friction.
friction force= 0.71*(4*p/29)
Now to find weight
weight= mg
weight= 4*9.8
for the object(small box) not to slide down the friction force b/w the two objects have to be exactly the same as the weight of the object.
0.71*(4*p/29)=4*9.8
solving for p(force)
p= 400.29N
........the horizontal force
