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Calculate the pressure exerted on the floor when an elephant who weighs 2400 N stands on one foot which has an area of 0.4 m^2.
6000 Nm^2
What is the density of a rectangular box measures 2m x 3m x 5m and has a mass of 5kg
6 Pa
If the density of water is 1000 kg/m3, what is the pressure due to the water at the bottom of a swimming pool 3m deep?
P= height x density x gravity =30 000Pa
Find the moment, if the force is 80 N.
160 Nm
Unit of force is __________.
Newton
Liquid pressure ________ with increase in depth. (a) Increases (b) Decreases (c) No change
increases
As we go higher, the density of air decreases and hence pressure ________
decreases
Moment can be calculated using ________ equation
force x distance
The property that decides whether the object will float or sink is its ________.
density
Solids are _________ dense than liquids
more
If a body floats in liquid it means its density is ________ than the density of liquid.
less
How do we calculate pressure?
Force/Area
What are the units for pressure? Newtons per square centimetre , Pascals , Newton metres
Pascal
Where is the pressure greatest in a liquid? At the bottom , At the top , In the middle
At the bottom
How can we increase pressure? Reducing surface area , Increasing surface area , Reducing force
Reducing surface area
what is the principle of moment?
Clockwise moment = Anticlockwise moment
A man with a weight of 740N is standing on one leg. His foot is exerting 2312.5 N/m^2 of pressure onto the ground. What is the surface area of the bottom of his foot?
0.32 m^2


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