Question

the second question. the answer to the first part is 616. pls i have a 34 on the assignment rn pls help

Answer 1

a) Ffloor = 616.56[N]

b) Ffloor = 484.16 [N]

Step-by-step explanation:

In order to solve this problem, we must first make a free body diagram. In this free body diagram include forces, as well as acceleration.

Then after the free body diagram, we perform a force analysis by means of Newton's second law, where the upward forces and even the upward acceleration will be taken as positive.

ΣF = m*a

where:

F = force [N] (units of Newtons]

m = mass [kg]

a = acceleration [m/s²]

g = gravity acceleration = 9,81 [m/s²]

a)

`F_(floor) -m*g = m*a`

`F_(floor) -(56*9.81)=56*1.2\\F_(floor)= 616.56[N]`

b) Using Newton's second law we have.

`F_(floor)-m*g= -m*a\\F_(floor)=-m*a+m*g\\F_(floor) = -(56*1.2) + (56*9.81)\\F_(floor) = 484.16 [N]`