Answer:
The energy loss due to friction is 9465 J.
Explanation:
The given data :-
Mass of roller (m) = 500 kg.
The speed of roller coaster at height 27 m = 5.6 m/s.
Initial height of roller( h ) = 27 m.
The speed of roller coaster at bottom = 22 m/s.
Initial energy of roller at a height 27 m.
E₁ = K.E + P.E
E₁ = = = 7840 + 132435
E₁ = 140,275 J
The energy of roller at a height 2 m.
E₂ = K.E + P.E
E₂ = = = 121000 + 9810
E₂ = 130,810 J
The energy loss due to friction = E₁ - E₂ = 140,275 - 130,810 = 9465 J.
The answer is a : fluids rise if they are less dense than the matter around them ! i hope this helped, despite being so late
1.
Answer:
Hand on book
Earth on book
Explanation:
Since we are holding the book so the forces that acts on the book is
1. Hand on book
this is the contact force between hand and the book
2. Earth on book
here this is the gravitational attraction force of earth on the book
2.
Answer:
A. book on hand - NA
B. hand on book - upwards
C. floor on book - NA
D. earth on book - downwards
Explanation:
Since book is holding in hand so at equilibrium position we can say that the forces on the book must be in equilibrium
so first of all the force of attraction due to earth on the book is downwards and this is counterbalanced by the force of hand on book which is upwards.
3.
Answer:
A. book on hand
Explanation:
As per Newton's III law we know that every action has equal and opposite reaction.
so if our hand apply the force on the book in upward direction then book will apply same magnitude force on the hand in downward direction.
Answer:
These parts of the force are called the components of the force. The component that pushes right or left is called the x-component, and the part that pushes up or down is called the y-component. Mathematically, the components act like shadows of the force vector on the coordinate axes.
Answer: atoms that are attracted to each other because the bonds that form between them can support the creation of the structure
Explanation: