When the object falls, it accelerates at first but it reaches a point where its weight downwards is equal to the viscous drag upwards plus upthrust. Hence resultant force is zero and acceleration is zero. Therefore it falls with a constant velocity, terminal velocity.
chrispohmomanyi answered the question on October 1, 2017 at 07:42
-
Explain why vaseline is applied on terminals of a lead acid accumulator after cleaning them.
(Solved)
Explain why vaseline is applied on terminals of a lead acid accumulator after cleaning them.
Date posted:
October 1, 2017
.
Answers (1)
-
Explain why telephone lines are loose on a hot day and tight during a cold day.
(Solved)
Explain why telephone lines are loose on a hot day and tight during a cold day.
Date posted:
October 1, 2017
.
Answers (1)
-
Explain why farm tractors have wide rear tyres.
(Solved)
Explain why farm tractors have wide rear tyres.
Date posted:
October 1, 2017
.
Answers (1)
-
Explain how radiations may be used to ensure that containers are filled up with equal amount of content.
(Solved)
Explain how radiations may be used to ensure that containers are filled up with equal amount of content.
Date posted:
October 1, 2017
.
Answers (1)
-
State two properties that distinguish cathode rays from x-rays.
(Solved)
State two properties that distinguish cathode rays from x-rays.
Date posted:
October 1, 2017
.
Answers (1)
-
State a substance whose relative density is 1.
(Solved)
State a substance whose relative density is 1.
Date posted:
October 1, 2017
.
Answers (1)
-
Define relative density.
(Solved)
Define relative density.
Date posted:
October 1, 2017
.
Answers (1)
-
State any difference between dry cells and an accumulator.
(Solved)
State any difference between dry cells and an accumulator.
Date posted:
October 1, 2017
.
Answers (1)
-
An automobile electrician notices that by replacing a wire, it becomes hot and its insulation burns off. Explain the most probable mistake she made.
(Solved)
An automobile electrician notices that by replacing a wire, it becomes hot and its insulation burns off. Explain the most probable mistake she made.
Date posted:
October 1, 2017
.
Answers (1)
-
A student is provided with a bar magnet and a string. Explain the easiest way of identifying the poles.
(Solved)
A student is provided with a bar magnet and a string. Explain the easiest way of identifying the poles.
Date posted:
October 1, 2017
.
Answers (1)
-
A man fixed a large concave mirror of focal length 2 m, 160 cm from his face. State three characteristics of his image in the mirror.
(Solved)
A man fixed a large concave mirror of focal length 2 m, 160 cm from his face. State three characteristics of his image in the mirror.
Date posted:
October 1, 2017
.
Answers (1)
-
Hammering of a magnet demagnetizes a magnet. Explain how this takes place.
(Solved)
Hammering of a magnet demagnetizes a magnet. Explain how this takes place.
Date posted:
October 1, 2017
.
Answers (1)
-
A charged electroscope is used in electrostatics study. State two of its uses.
(Solved)
A charged electroscope is used in electrostatics study. State two of its uses.
Date posted:
October 1, 2017
.
Answers (1)
-
What does the following statement represent? ‘like charges repel while unlike charge attract’.
(Solved)
What does the following statement represent? ‘like charges repel while unlike charge attract’.
Date posted:
October 1, 2017
.
Answers (1)
-
State the kind of image formed in a pinhole camera when the pinhole is enlarged
(Solved)
State the kind of image formed in a pinhole camera when the pinhole is enlarged.
Date posted:
October 1, 2017
.
Answers (1)
-
A barber places two mirrors in parallel. State the number of images formed if a client sat between them.
(Solved)
A barber places two mirrors in parallel. State the number of images formed if a client sat between them.
Date posted:
October 1, 2017
.
Answers (1)
-
An image is always formed upside down in a pin hole camera. State the reason.
(Solved)
An image is always formed upside down in a pin hole camera. State the reason.
Date posted:
September 29, 2017
.
Answers (1)
-
Give a reason why mercury is a suitable liquid for use in a barometer.
(Solved)
Give a reason why mercury is a suitable liquid for use in a barometer.
Date posted:
September 29, 2017
.
Answers (1)
-
A girl opened a strong perfume in class bought from the beauty shop. State the reason why the perfume was detected throughout the room.
(Solved)
A girl opened a strong perfume in class bought from the beauty shop. State the reason why the perfume was detected throughout the room.
Date posted:
September 29, 2017
.
Answers (1)
-
Differentiate between floatation and sinking in terms Archimedes principle.
(Solved)
Differentiate between floatation and sinking in terms Archimedes principle.
Date posted:
September 28, 2017
.
Answers (1)