Answer:
y=55.6 cm
Explanation:
Given that
m=0.5 kg
L= 1 m
h= 70 cm = 0.7 m
coefficient of kinetic friction( μ ) = 0.144
Lets take maximum of height achieved by block on the right side
The friction force on the flat part
fr= μ m g
Initial velocity at the top left is zero and the final speed of the bock at right top will be zero .
we know that work done by all force = Change in kinetic energy
Here initial and final speed is zero so the change in kinetic energy is zero.
m g h - fr . L - m g y=0
fr= μ m g
m g h - μ m g .L - m g y=0
h - μ.L - y = 0
By putting the values
0.7 - 0.144 x 1 - y = 0
y=0.556 m
y=55.6 cm
Answer:
The specific gravity of the unkown liquid is 15.
Explanation:
Gauge pressure, at the bottom of the tank in this case, can be calculated from
where and
are the height of the column of oil and the unkown liquid, respectively. Writing for
, we have
Relative to water, the unknow liquid specific weight is 15 times bigger, therefore this is its specific gravity as well.
Answer:
Newtons.
Explanation:
Force is given by the multiplication of mass and acceleration.
Mathematically, Force is;
Where;
F represents force measured in Newton.
m represents the mass of an object measured in kilograms.
a represents acceleration measured in meter per seconds square.
Newtons is a measurement we use to determine the amount of force used to move an object by a simple machine. It is the International System of Units (SI) used to measure force and has a symbol of N.
Basically, it was named after Sir Isaac Newton based on his fundamental works in the field of mechanics (motions).