Aman weighs 650 n. inside a moving elevator, the floor exerts an upward force of 620 n on the man. what is the magnitude and direction of the man's acceleration?

Man's acceleration is 0.452 in downward direction

Explanation:

Weight of man, W= 650 N

Normal force exerted by floor of elevator , N= 620 N

Since weight , W = mg

mass m=

Using Newtons 2nd law

W-N= ma     where a= acceleration of man in the downward direction

=> 650-620=

=> a= 0.452 in downward direction

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards