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.
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The time in air is determined by the initial vertical velocity. This is because, the steeper the launch angle the larger the vertical velocity component, that causes the launch angle to increase the time in air.
I did Physics a while ago but I believe my answer is correct. (:
Hope this helps! (:
Answer:
a spark
Explanation:
a spark would be the most smartest
<span>A. Work = integral of force across a path. Since the force is constant, just multiply them: force*distance = 200N * (1m*sin(30)) = 100 Nm = 100 J
B. Use Newton: F=ma. For this, we need to use the sum of all the forces, not just the work we apply on the books, but gravity and friction too. Constant velocity means zero acceleration, which means the sum of forces is zero. Draw a free body diagram with the three forces and you'll see that the uphill force = the downhil force =>
200N = NormalForce*Coefficient + Gravity*mass*sin(30)
200N = Gravity*mass*cos(30)*coef. + Gravity*mass*sin(30)
200N = 9.81*mass*(cos(30)*0.18 + sin(30))
mass = 200/(9.81*(cos(30)*0.18 + sin(30)))
m = 31.23 kg</span>
Answer:B
Explanation: pls give brainliest
