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ADIVHAHO
Questions (57)
The earth has a diameter of 12 742 km. Calculate the following: 2.2.1 The angular velocity of the tree that is on the equator
1 answer
145 views
The wheel of a belt drive rotates at 1500 rpm. The belt is subjected to an effective force of 800 N. If the power transmitted by
1 answer
85 views
A square cast-iron bar is placed under 50 kN pressure. 6.3.1 Calculate the dimensions of the bar if the stress in the bar is not
1 answer
56 views
Calculate the power consumed by: A lathe in which the cutting force applied to the tool is 700 N, and the rotational speed of
1 answer
62 views
Calculate the power consumed by: a) A shaper that is operating with a cutting force of 650 N and a stroke length of 130 mm, and
1 answer
45 views
The circumference of a right-angled triangle is 24 cm and its hypotenuse is 10 cm. Determine the lengths of the other two sides
1 answer
113 views
Calculate the power required to put a mass of 120 kg at a constant velocity of 5 m/s down a plane. The plane makes an angle of
1 answer
52 views
A truck that travels on a level road at 60 km/h can be stopped by its brakes in a distance of 51 m. The mass of the truck is 5
1 answer
60 views
Coefficient of friction
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45 views
The engine of a vehicle develops 40 kW at a speed of 960 r/min. Calculate the torque developed.
1 answer
43 views
A point on the rim of a wheel with a diameter of 1 250 mm has a velocity of 396 km/h. Calculate the following: 2.2.1 The
1 answer
40 views
An aeroplane can travel at 150 km/h in still air. The wind is blowing at 50 km/h from the south-west.
Calculate the following:
1 answer
72 views
Two conveyor belts used to transport luggage at an airport runs parallel to each other but in opposite directions. Belt A has a
1 answer
66 views
Two conveyor belts used to transport luggage at an airport runs parallel to each other but in opposite directions. Belt A has a
1 answer
65 views
Prove by making calculations that a cannon will shoot three times as high when the angle of projection is 60 as when it is 30°.
1 answer
39 views
A goalkeeper kicks the ball from his goal area at a velocity of 20 m/s and at an angle of 31° to the horizontal. Calculate: 4.1
1 answer
41 views
A goalkeeper kicks the ball from his goal area at a velocity of 20 m/s and at an angle of 31° to the horizontal. Calculate: 4.1
1 answer
54 views
A goalkeeper kicks the ball from his goal area at a velocity of 20 m/s and at an angle of 31° to the horizontal. Calculate: 4.1
1 answer
47 views
Two planes take off from OR Tambo Airport shortly after each other. The one flies to Durban and the other flies to Cape Town.
3 answers
66 views
Two planes take off from OR Tambo Airport shortly after each other. The one flies to Durban and the other flies to Cape Town.
1 answer
55 views
As winter approaches, a flock of swallows departs from South Africa for the north. Using their internal magnetic orientation
1 answer
40 views
As winter approaches, a flock of swallows departs from South Africa for the north. Using their internal magnetic orientation
1 answer
59 views
An aircraft flies at 720 km/h in a direction 40° south of west. A strong wind is blowing at 85 km/h in a direction 35° east of
1 answer
61 views
An aircraft flies at 720 km/h in a direction 40° south of west. A strong wind is blowing at 85 km/h in a direction 35° east of
1 answer
49 views
7. An aircraft flies at 720 km/h in a direction 40° south of west. A strong wind is blowing at 85 km/h in a direction 35° east
1 answer
60 views
The velocity of an aeroplane in still air is 510 km/h. The plane flies due west but experiences a crosswind of 120 km/h from the
1 answer
61 views
The velocity of an aeroplane in still air is 510 km/h. The plane flies due west but experiences a crosswind of 120 km/h from the
1 answer
60 views
A small boat moving at 15 km/h crosses a 350 m wide river. The water runs at 6 m/s towards the left. Calculate: 5.1 The time it
1 answer
79 views
A small boat moving at 15 km/h crosses a 350 m wide river. The water runs at 6 m/s towards the left. Calculate:
5.1 The resultant
1 answer
77 views
A small boat moving at 15 km/h crosses a 350 m wide river. The water runs at 6 m/s towards the left. Calculate: (4) 5.1 The
1 answer
63 views
A ship that can cruise at a speed of 30 km/h in still waters sets a south- westerly course. It is driven off course by a current
1 answer
73 views
A ship that can cruise at a speed of 30 km/h in still waters sets a south- westerly course. It is driven off course by a current
1 answer
63 views
An aircraft is 70 km northeast from the airport it departed from and flies north for 4 hours at a velocity of 100 km/h.
3 answers
64 views
Two cars leave a fork in a road at the same time. Car Q travels at 65 km/h to the west and car P travels at 95 km/h at 45°
1 answer
78 views
A train is travelling in a westerly direction at 100 km/h. A passenger notices an aeroplane appearing to fly at 180 km/h south.
1 answer
57 views
A belt conveyor must transmit 135 kW of power. The driving pulley has a diameter of 500 mm, and rotates at 75 r/min. Assume that
1 answer
96 views
A container with a capacity of 1 l of water is heated from 5°C to 40°C. If the container is completely full at 5 °C and the
1 answer
57 views
A container with a capacity of 1 l of water is heated from 5°C to 40°C. If the container is completely full at 5 °C and the
1 answer
55 views
Calculate the increase in the water level if a container with a round base, diameter 5 cm, is filled with water up to a level 35
1 answer
60 views
120 ml of ethyl alcohol is heated from -15°C to 30 °C in a glass flask with a linear expansion coefficient of 90 x 10-6/°C.
1 answer
74 views
120 ml of ethyl alcohol is heated from -15°C to 30 °C in a glass flask with a linear expansion coefficient of 90 x 10-6/°C.
1 answer
75 views
A glass vessel with a capacity of 200 ml is completely filled with turpentine at 5 °C. The cubic expansion coefficient of glass
1 answer
70 views
A glass bulb is filled with 0.6 m² of mercury at a temperature of 20 °C. The bulb and mercury are heated to 70°C. The linear
1 answer
81 views
A glass vessel is completely filled with 60 cm³ of mercury at 18 °C. The temperature of the (5) any glass vessel and its
1 answer
74 views
A glass flask has a capacity of 60 cm³ at 12 °C. Calculate the capacity of the flask at a temperature of 50 °C if the glass
1 answer
86 views
12. A steel ball has a diameter of 60 mm and is 0,01 mm too large to pass through a hole in a brass plate when the ball and the
1 answer
68 views
The temperature of a steel rod with a diameter of 50 mm and a length of 150 mm is increased by 90 K. The increase in volume is
1 answer
66 views
7. The temperature of a right rectangular prism of carbon steel with dimensions 70 x 130 x 10 mm is increased by 45 °C. The
1 answer
69 views
A piece of wire, original length 120 mm, is heated from 20°C to 95 °C. If the final length of the wire is 120,324 mm,
1 answer
70 views
A metal plate is a 1 m square at 283 K. There is a hole of 600 mm in diameter in the centre. The linear coefficient of expansion
1 answer
99 views
A metal plate is a 1 m square at 283 K. There is a hole of 600 mm in diameter in the The linear coefficient of expansion of the
2 answers
103 views
A metal plate is a 1 m square at 283 K. There is a hole of 600 mm in diameter in the The linear coefficient of expansion of the
1 answer
135 views
An iron plate is a 10 cm square at 12 °C. The linear expansion coefficient of iron is 11 x 10-6/°C. Calculate: b) The new area
1 answer
68 views
An iron plate is a 10 cm square at 12 °C. The linear expansion coefficient of iron is 11 x 10-6/°C. Calculate: b) The lengths
1 answer
107 views
An iron plate is a 10 cm square at 12 °C. The linear expansion coefficient of iron is 11 x 10-6/°C. Calculate: a) The area
1 answer
77 views
A steel tape measures the length of a copper rod as 920 mm when the temperature is 280 K. Calculate the reading at 370 K. The
1 answer
85 views
A brass rod is heated from 295 K to 400 K. At 295 K the rod is 2,5 m long. The linear expansion coefficient of brass is 20 ×
1 answer
98 views
