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



Similarly net lift force on the refrigerator is given as



Now net force on the refrigerator is given as



Concave lens. These are used in making the objectives of reflection telescopes
V = p / m
V = 1000 / 2.5
V = 400 m/s
hope this helps!
Answer:
0.82 m
Explanation:
We are given that
Weight,
=225 N
Length,l=5 m
d=1.1 m
We have to find the distance x for which person weighs 385 N walk on the overhanging part of the plank before it just begins to tip.
Half length=


When system in equilibrium then




C. Magnetism
Very few minerals are magnetic, while streak hardness and specific gravity can be used to identify lots of minerals