Answer:
<em>1,839.375 Joules</em>
Explanation:
Work is said to be done is the force applied to an object cause the object to move through a distance.
Workdone = Force * Distance
Workdone = mass * acceleration due to gravity * distance
Given
Mass = 75.0kg
acceleration due to gravity = 9.81m/s²
distance = 2.50m
Substitute the given parameters into the formula:
Workdone = 75.0*9.81*2.50
Workdone = 1,839.375Joules
<em>Hence the workdone is 1,839.375 Joules</em>
Speed ignores the direction of motion and is a scalar quantity. Velocity requires a directional component (like the arrow in a vector). In circular motion, the speed remains the same but the velocity is constantly changing since the direction of motion is constantly changing (ie. it is accelerating).
Answer:
A
Explanation:
Finish-Start
Finish to Start is a Logical Relationship in which a Successor Activity cannot start until a Predecessor Activity has finished. What it really means in simple terms we can say that, the Start of a Successor Activity is Dependent on Finish of the Predecessor Activity.
The acquisition of all supplies which is the predecessor activity must finish before the electicalmwork can start which is the successor activity.
I would choose the vinegar before baking soda because the baking soda is what is making the chemical reaction with the vinegar. Both need eachother but the vinegar is a less powerful reactant than the baking soda.
To solve this problem we will apply the work theorem. That is, the work can be expressed as the product between the force applied and the distance traveled of the object to perform a given action. Mathematically
W = F*d
In turn, from the definition of Force, we know that according to Newton's second law, it is the product between mass and acceleration. Mathematically
F = ma
Since the acceleration is zero, because the velocity is constant, we will have to
F = m * (0)= 0
Therefore work
W = 0*d cos37
W = 0 J
The correct answer is B.
