Question

6. Four people are trying to help push and lift a refrigerator up a series of stairs. Jim pushes

Answer 1

Answer:

Net force due to all on the refrigerator is 400 N

Explanation:

As we know that two people are pushing the refrigerator while other two people are lifting the refrigerator

So net push force on the refrigerator is given as

$F = F_1 + F_2$

$F = 60 + 210$

$F_1 = 270 N$

Similarly net lift force on the refrigerator is given as

$F = F_1' + F_2'$

$F = 200 + 95$

$F_2 = 295 N$

Now net force on the refrigerator is given as

$F_{net} =\sqrt{F_1^2 + F_2^2}$

$F_{net} = \sqrt{270^2 + 295^2}$

$F_{net} = 400 N$