Kinetic Energy = 1/2mv^2
m= 1200kg
v= 24 m/s
KE = 1/2 (1200kg)(24m/s)^2 = 345,600 N
If all the sides are equal, then it is an equilateral triangle. This means after walking 100 meters, you had to turn 1/3 of 180 degrees (because that's what the interior angles of the triangle add up to).
So, 180 * 1/3 = 60 degrees.
We aren't done yet.
60 degrees is not the angle which you have turned from your path.
You turned 120 degrees to describe an angle of 60 degrees on the interior side.
The answer is B.
Answer:
Reducing Discrimination by Changing Social Norms
Reducing Prejudice through Intergroup Contact
Explanation:
Answer:
speed is 4/3 × g × sin β
acceleration is g sin θ
Explanation:
Given data
mass = M
radius = R
distance = s
angle = β
to find out
final speed and the acceleration
solution
we know that cylinder is rolling on inclined plane
so from conservation of mechanical energy
energy at top = energy at bottom
energy at top will be
= m ×g×h
= m ×g×s sinβ ................1
and
energy at bottom will be
= 1/2 ×m × v² + 1/2 × z × ω²
= 1/2 ×m × v² + 1/2 × 1/2 ×m× r² × (v/r)²
= 3/4 × v² .................2
equating now equation 1 and 2
m ×g×s sinβ = 3/4 × v²
so v = 4/3 × g × sin β
so speed is 4/3 × g × sin β
and acceleration is
= mg sin θ ............3
and
acceleration = ma ............4
now equation equation 3 and 4
ma = mg sin θ
so acceleration is g sin θ
Answer:
Explanation:
Given
A plastic rod is rubbed with a woolen cloth and the Glass rod is rubbed with silk rod.
After the rubbing Plastic rod will acquire the negative rod and the glass rod will acquire a positive charge.
(a)If an object repels the plastic rod then it must be of the same nature i.e. of negative charge.
As the object is negative in nature it will attract the glass rod.
(b)Another object is attracting the plastic rod i.e. the object must be positively charged as a plastic rod. This happens because the opposite charge attracts and same charge repel each other.
It will repel the glass rod