Physics Quiz - Pressure
1. The concentration of a force is called:
A
pressure
B
mass intensity
C
weight
2. The rule for pressure is:
A
force X area
B
force / area
mass / volume
3. The unit for pressure is:
A
Newtons per cubic metre
B
Newtons per square metre
C
kilograms per metre
4. Using the same muscular force, a karate chop with the side of the hand will hurt more than a hit with the open hand because:
A
the contact surface area is smaller with the karate blow
B
the karate fighter is small but hits harder
C
there are more bones in the side of the hand than the open hand
5. Four-wheel drive owners let air out of their tyres before driving on sand. This is because:
A
the tyre pressure increases when driving on sand compared with bitumen, and they are avoiding a blow-out
B
sand has more friction than bitumen
C
the contact area between the tyres and the sand is increased
6. A thumb tack has a large flat surface and a pointed end. With the same applied pressure, which part will have the greatest pressure?
A
the pointed end
B
the large flat part where the finger pushes
C
they have the same pressure
7. What happens to the water as one goes deeper into the ocean?
A
decreases
B
stays the same
C
increases
8. Ships are made from iron. The reason why they do not sink is because:
A
iron has a density less than water
B
they have a large surface area of the hull
C
they are filled with air
9. Air pressure is less than that of liquids. This is because:
A
gases exert no pressure at all
B
air is less dense and takes up a greater volume and area
C
liquids are less buoyant fluids than are gases
10. Atmospheric pressure at sea level is greater than on top of mountains. This is because:
A
there is more air in a given area at sea level
B
there is less at sea level due to sea breezes
C
water eveporates to a vapour increasing the density of the air at sea level
11. Water boils on Mount Everest at a temperature less than 100 degrees Celsius. This is because:
A
Mount Everest is always cold therefore all reactions occur at lower temperatures
B
there is less atmospheric pressure preventing the escape of gas bubbles from the water
C
water always boils at the same temperature no matter where it is on earth
12. The force of an object is 100 Newtons. The area on which the force acts is 2 square metres. What is the pressure in Newtons per square metre?
A
200
B
100
C
50
13. Two identical blocks of wood are placed side by side on a table. One lies on its larger side, and the other stands on its smaller end. Which is exerting the greatest pressure on the table?
A
the one standing on its end
B
the one lying on the larger side
C
both exert the same pressure
14. A 12 Newton force acting on an area of 3 square centimetres exerts a pressure of:
A
4 Newtons per square metre
B
400 Newtons per square centimetre
C
40000 Newtons per square metre
15. A person whose mass is 50 kg (weight about 500 N) has a surface area on one foot of 0.01 square metres. What pressure does the person exert on the ground if standing on both legs?
A
50000 Newtons per square metre
B
25000 Newtons per square metre
C
5 Newtons per square centimetre
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