Answer:
W = 62.7 J
a = 0.26 m/s²
Explanation:
Work (W) is defined as the product of force( F) by the distance (d) the body travels due to this force.
W= F*d Formula ( 1)
The work is positive (W+) if the force has the same direction of movement of the object.
The work is negative (W-) if the force has the opposite direction of the movement of the object.
The component of the force that performs work must be parallel to the displacement.
Data
F = 11 N
d = 5.7 m
Work done by Zak on the sofa
We apply the Formula ( 1)
:
W = (11 N )* (5.7 m)
W = 62.7 J
Average acceleration of the sofa
We apply Newton's second law to the sofa :
∑F = m*a Formula (2)
∑F : algebraic sum of the forces acting on the sofa (N)
m : mass (kg)
a : acceleration (m/s²)
Data : m= 42.3 kg , F= 11 N
We replace Data in the formula (2)
F = m*a
11 = (42.3)*a
a = (11) / (42.3)
a = 0.26 m/s²
Aster's final position from her initial position is 63 m approximately. She will head north west direction to return to her initial position
<h3>
What is Displacement ?</h3>
Displacement is the distance travelled in a specific direction. It is a vector quantity.
Given that a person walks first 70 m in the direction 37° north of east, and then walks 82 m in the direction 20° south of east, and finally walks 28 m in the direction 30° west of north.
a) Let P be the Aster's final position from her initial position?
We can use bearing by using Cosine formula to solve this question.
P² = 70² + 82² - 2 × 70 × 82 cos 73
P² = 4900 + 6724 - 11480 cos 73
P² = 11624 - 3356.43
P² = 8267.57
P = √8267.57
P = 90.9 m
P = 90.9 - 28
P = 62.9 m
We can get the angle by using Sine rule
82/ sin Ф = 90.9 / sin 73
sin Ф = 0.8627
Ф = (0.8627)
Ф = 59.6°
Ф = 60°
b) She will head north west direction to return to her initial position
Learn more about Displacement here: brainly.com/question/2109763
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The speed of the carts descent will increase? Not quite sure what you’re asking.
You could talk about how the planets spin around the sun, how the universe has galaxies, and we are in the milky way. Blue shift and red shift,etc?
Answer:
The ability to do work
Explanation:
Energy can be defined as the ability to do work. We apply energy in basically everything we do in life, energy is needed to walk or move from one position to another, it is required to eat and do other basic things of life. The body system converts the food that is being consumed into energy, this energy can be switched from one form to another.
There are various forms of energy which include solar energy , wind energy, electrical energy, mechanical energy, kinetic energy, potential energy etc. This forms of energy can be converted from one form to anothe but cannot be destroyed.