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8/9/2019 Pressure Exercise
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TOPIC: PRESSURE (CLASSWORK)
1. The figure shows a rectangular wooden block of density 900 kg
m -3 placed on ahorizontal ground.
a. Find the volume of the wooden block. b. Find the mass of the
wooden block. c. Find the force exerted by the block on the ground.
d. What is the greatest pressure exerted on the ground
by the block?
e. Determine the least pressure exerted on the groundby the
block.
[Take g = 10 N kg-1]
2. A cube of side 0.2 m rests on the floor as shown. Given that
thecube has a density of 7 g cm -3, what is the pressureexerted by
the cube on the floor?
[Take g = 10 N kg-1]
3. A cube of side X rests on the floor as shown . Given that the
pressureexerted by this cube on the floor is P, what is the
pressure exerted
by another cube of the same material of side 4X? [Take g = 10 N
kg-1]
4. The figure shows a rectangular container with cross
-sectional area 2 m3 filled withwater and liquid Y of density 800
kg m
3. The container is placed in a room where the
barometer reading is 760 mm Hg. [Density of water = 1000 kg
m-3
, density of mercury
= 13 600 kg m-3. Take g = 10 N kg
-1]
a. Find the pressure due to liquid Y. b. Find the force acting
on the water surface due to
liquid Y.c. Find the pressure and the force at the bottom
of the container.
5. A block of dimension 0.2 m x 0.3 m x 0.4 m rests on the floor
as shown. Given thatthe block has a density of 5 g cm
-3, what is the highest pressure the block can exert on
the floor?
[Take g = 10 N kg-1]
3 m
1 m
2 m
0.2 m
4XX
Liquid Y
Water
1 m
0.5 m
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8/9/2019 Pressure Exercise
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Revision question
6. A box of mass 2 kg is lifted vertically upwards by 3 m. Given
that the acceleration dueto gravity is 10 m/s
2, what is the gravitational potential energy gained by the
box?
7. A box of mass 500 g is moving at a constant speed of 72
km/h.What is the kineticenergy of the box?
TOPIC: PRESSURE (CLASSWORK)
1. The figure shows a rectangular wooden block of density 900 kg
m -3 placed on ahorizontal ground.
a. Find the volume of the wooden block. b. Find the mass of the
wooden block. c. Find the force exerted by the block on the ground.
d. What is the greatest pressure exerted on the ground
by the block?
e. Determine the least pressure exerted on the groundby the
block.
[Take g = 10 N kg-1]
2. A cube of side 0.2 m rests on the floor as shown. Given that
thecube has a density of 7 g cm -3, what is the pressureexerted by
the cube on the floor?
[Take g = 10 N kg-1]
3. A cube of side X rests on the floor as shown . Given that the
pressureexerted by this cube on the floor is P, what is the
pressure exerted
by another cube of the same material of side 4X? [Take g = 10 N
kg
-1
]
4. The figure shows a rectangular container with cross
-sectional area 2 m3 filled withwater and liquid Y of density 800
kg m
3. The container is placed in a room where the
barometer reading is 760 mm Hg. [Density of water = 1000 kg
m-3
, density of mercury
= 13 600 kg m-3. Take g = 10 N kg
-1]
a. Find the pressure due to liquid Y.
3 m
1 m
2 m
0.2 m
4XX
Liquid Y1 m
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8/9/2019 Pressure Exercise
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b. Find the force acting on the water surface due toliquid
Y.
c. Find the pressure and the force at the bottomof the
container.
5. A block of dimension 0.2 m x 0.3 m x 0.4 m rests on the floor
as shown. Given thatthe block has a density of 5 g cm
-3, what is the highest pressure the block can exert on
the floor?
[Take g = 10 N kg-1]
Revision question
6. A box of mass 2 kg is lifted vertically upwards by 3 m. Given
that the acceleration dueto gravity is 10 m/s
2, what is the gravitational potential energy gained by the
box?
7. A box of mass 500 g is moving at a constant speed of 72
km/h.What is the kineticenergy of the box?
