Answer:
Mass.
Explanation:
I took the quiz and got the answer right
The upward force exerted by the elevator floor on the passenger is 7.6 times mass of the passenger.
<h3>What is force?</h3>
A force in physics is an effect that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
Given in question elevator accelerates downwards with an acceleration of 1.2 m/s². There is acceleration due to gravity working downward which is 9.8 m/s².
So, net acceleration due to gravity is given as 9.8 - 1.2 = 7.6 m/s²
The upward force exerted by the elevator floor on the passenger is mass times acceleration, 7.6 times mass of passenger.
To learn more about force refer to the link:
brainly.com/question/13191643
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<h3><u>Volume is 0.1848 m³</u></h3><h3 />
Explanation:
<h2>Given:</h2>
m = 49.9 kg
ρ = 270 kg/m³
<h2>Required:</h2>
volume
<h2>Equation:</h2>
where: ρ - density
m - mass
v - volume
<h2>Solution:</h2>
Substitute the value of ρ and m
<h2>Final Answer:</h2><h3><u>Volume is 0.1848 m³</u></h3>
Answer:
Potential energy is
Explanation:
Given situation is shown in figure 1
In order to calculate the potential energy at the moment block started moving we first have to calculate the net force acting on the block. For this consider figure 2
<h3>Forces acting in vertical direction:</h3>
Normal force Fn acting on block is in upward direction which is balanced by horizontal component of weight of block acting in opposite direction.
<h3>Forces acting in horizontal direction:</h3>
Tension in string is equal and opposite to frictional force and and vertical component of weight as show in figure 2
Frictional force is:
From (1)
(2) becomes then
If spring is not accelerating then tension in rope must be equal spring force i.e
Then (2) becomes
Potential energy is given as