Answer:
2870 N
Explanation:
There are three forces on the mattress. Weight of the mattress, weight of the person, and buoyancy.
∑F = ma
B - mg - Mg = 0
Buoyancy is equal to the weight of the displaced fluid.
ρVg - mg - Mg = 0
ρV - m = M
Plugging in values:
M = (1000 kg/m³) (0.75 m × 2.25 m × 0.175 m) - 2 kg
M = 293 kg
The person's weight is therefore:
Mg = 293 kg × 9.8 m/s²
Mg = 2870 N
They are almost the same temperature!!
Answer:
x = 0.47 m
Explanation:
PS = ½kx²
x = √(2PS/k) = √(2(49)/450)) = 0.466666...
Well, assuming that the world would break if we didnt have inertia, in baseball, when you tried to catch a ball you would probably go flying backwards until other things stopped you (friction etc). you also probably wouldnt be able to run without the earth going all out of its path around the earth. every step you would take would push the earth because there is no inertia to keep the earth at one point
