Acceleration due to gravity changes from place to place away from the earth.
OR
Because gravitational force varies with distance from the centre of the earth. Since weight depends on the gravitational pull, then it also varies.
johnmulu answered the question on February 6, 2017 at 08:14
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A student measured the length of a wire four times using a metre rule and obtained the following readings
(Solved)
A student measured the length of a wire four times using a metre rule and obtained the following readings: 18.6 cm; 18.5 cm and 18.6 cm. Determine the length the length the student should record
Date posted:
February 6, 2017
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Answers (1)
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State the reason why it is not correct to quote the weight of solid objects in kilograms
(Solved)
State the reason why it is not correct to quote the weight of solid objects in kilograms
Date posted:
February 6, 2017
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Answers (1)
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A stopwatch started 0.50s after the start button was pressed. The time recorded using the stopwatch for a ball bearing falling through a liquid was 2.53s.
(Solved)
A stopwatch started 0.50s after the start button was pressed. The time recorded using the stopwatch for a ball bearing falling through a liquid was 2.53s. Determine the time of fall.
Date posted:
February 6, 2017
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Answers (1)
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A drug manufacturer gives the mass of the active ingredient in a tablet as 5 mg. Express this quantity in kilogramme and in standard form
(Solved)
A drug manufacturer gives the mass of the active ingredient in a tablet as 5 mg. Express this quantity in kilogramme and in standard form.
Date posted:
February 6, 2017
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Answers (1)
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Why should a safety belt used in a vehicle have a wide surface area and be slightly extensible?
(Solved)
Give reasons why a safety seat belt used in a vehicle;should have a wide surface area and should be slightly extensible.
Date posted:
January 16, 2017
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Answers (1)
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A girl throws tennis ball vertically upwards from a truck moving at a constant velocity
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A girl throws tennis ball vertically upwards from a truck moving at a constant velocity. Give the reason why the ball lands back exactly the same point where it was projected.
Date posted:
January 16, 2017
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Answers (1)
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When a steel ball bearing is dropped into a tall jar full of glycerine, it falls to reach a point when it attains a steady velocity
(Solved)
When a steel ball bearing is dropped into a tall jar full of glycerine, it falls to reach a point when it attains a steady velocity. State the force that varies to make this possible.
Date posted:
January 16, 2017
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Answers (1)
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Explain why milk in a bottle cools faster when the bottle is wrapped with wet towel
(Solved)
Milk in a bottle cools faster when the bottle is wrapped with a wet towel than when it is immersed in a bucket of cold water. Explain
Date posted:
January 16, 2017
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Answers (1)
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State samples of bromine vapour are allowed to diffuse separately under different conditions
(Solved)
State samples of bromine vapour are allowed to diffuse separately under different conditions; one in vacuum and the other in air. State and explain the observation made.
Date posted:
January 16, 2017
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Answers (1)
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Why is it easier to stop a saloon car than a bus moving at the same velocity?
(Solved)
It is easier to stop a saloon car than a bus moving at the same velocity. What is the reason?
Date posted:
January 14, 2017
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Answers (1)