1. Mechanics – the study of motion of bodies under the influence of force.
2. Electricity – this deals with the movement of charge from one point to another through a conductor.
3. Magnetism – the study of magnets and magnetic fields and their extensive applications.
4. Thermodynamics / heat – this is the study of the transformation of heat from one form to another.
5. Optics –the study of light as it travels from one media to another
6. Waves – the study of disturbances which travel through mediums or a vacuum.
sharon kalunda answered the question on April 11, 2019 at 05:23
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A ball is thrown horizontally from the top of a building and lands 100 m from the foot
of the building. If the building is 60...
(Solved)
A ball is thrown horizontally from the top of a building and lands 100 m from the foot
of the building. If the building is 60 m high, calculate
a. The time of flight of the ball
b. Initial horizontal component of the velocity
c. Vertical component velocity of the ball just before it hits the ground?
Date posted:
April 10, 2019
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Answers (1)
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A ball is projected vertically upwards with an initial velocity of 20 m/s. Determine
a. its maximum height
b. the time taken to return to its starting...
(Solved)
A ball is projected vertically upwards with an initial velocity of 20 m/s. Determine
a. its maximum height
b. the time taken to return to its starting point.
Date posted:
April 10, 2019
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Answers (1)
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The figure below shows a 10- tick strip ticker tape chart of for the motion of a trolley. The ticker
tape timer was connected to a...
(Solved)
The figure below shows a 10- tick strip ticker tape chart of for the motion of a trolley. The ticker
tape timer was connected to a 50 Hz power supply. Which of the following statements is
true about the motion of the trolley?
Calculate the
a. total distance travelled
b. average velocity
c. acceleration of the trolley
Date posted:
April 10, 2019
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Answers (1)
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The figure below shows a ticker-tape for trolley used in an experiment.
(Solved)
The figure below shows a ticker-tape for trolley used in an experiment.
If the frequency of the ticker timer was 50Hz, calculate,
a. Initial velocity
b. Final velocity
c. Acceleration of the trolley
Date posted:
April 10, 2019
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Answers (1)
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The ticker-tape in the figure below was produced by a trolley moving over an inclined
plane. If the ticker-tape timer produced 50 dots per second, find...
(Solved)
The ticker-tape in the figure below was produced by a trolley moving over an inclined
plane. If the ticker-tape timer produced 50 dots per second, find the
a. Initial velocity at P
b. Final velocity at Q
c. Acceleration of the toy car.
Date posted:
April 10, 2019
.
Answers (1)
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An athlete swims from the east end to the west end of a 75 m pool in 25 s and makes the return trip to...
(Solved)
An athlete swims from the east end to the west end of a 75 m pool in 25 s and makes the
return trip to the starting position in 28 s. calculate the,
a. Average velocity outwards
b. Average velocity back
c. Average velocity for the roundtrip
Date posted:
April 10, 2019
.
Answers (1)
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A swimer takes off straight up from a diving board 1.80 m above water surface in a pool and
falls into the swimming pool. If her...
(Solved)
A swimer takes off straight up from a diving board 1.80 m above water surface in a pool and
falls into the swimming pool. If her initial velocity is 5 m/s , determine
a. The highest point above the board
b. Her velocity as she hits the water
c. The time she takes to hit the surface of water
Date posted:
April 10, 2019
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Answers (1)
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A cat was seen to jump over a chair 1.50 m high. Considering just its vertical motion,
(Solved)
A cat was seen to jump over a chair 1.50 m high. Considering just its vertical motion,
a. Calculate its take off vertical velocity
b. How long does it stay in the air?
Date posted:
April 10, 2019
.
Answers (1)
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A trolley covers a distance of 275 m moving with uniform acceleration of 10 ms-2. If its initial velocity was 30 ms-1. Calculate its final...
(Solved)
A trolley covers a distance of 275 m moving with uniform acceleration of 10 ms-2. If its initial velocity was 30 ms-1. Calculate its final velocity.
Date posted:
April 10, 2019
.
Answers (1)
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Using a ticker-timer that vibrates at a frequency of 50 Hz, a student carried out an experiment
to study the motion of a trolley.The figure below...
(Solved)
Using a ticker-timer that vibrates at a frequency of 50 Hz, a student carried out an experiment
to study the motion of a trolley.The figure below shows a tape chart consisting of 10-tick strips that
he obtained.
Calculate the
a. total distance travelled
b. average velocity
c. acceleration of the trolley
Date posted:
April 10, 2019
.
Answers (1)
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The figure below shows ticker tape chart for a trolley pushed up a slope. Every section of the tape
contains 5 spaces. If the ticker-tape timer...
(Solved)
The figure below shows ticker tape chart for a trolley pushed up a slope. Every section of the tape
contains 5 spaces. If the ticker-tape timer has a frequency of 50 Hz, determine the
acceleration of the trolley.
Date posted:
April 10, 2019
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Answers (1)
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The figure below shows a ticker-tape for trolley moving over an inclined plane, a frequency
of 50Hz.
(Solved)
The figure below shows a ticker-tape for trolley moving over an inclined plane, a frequency
of 50Hz.
Calculate,
a. Initial velocity
b. Final velocity
c. Acceleration of the trolley
Date posted:
April 10, 2019
.
Answers (1)
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The ticker-tape in Figure below was produced by a toy car moving over an inclined plane.
If the ticker-tape timer produced 100 dots per second, find...
(Solved)
The ticker-tape in Figure below was produced by a toy car moving over an inclined plane.
If the ticker-tape timer produced 100 dots per second, find the
a. Initial velocity at A
b. Final velocity at B
c. Acceleration of the toy car.
Date posted:
April 10, 2019
.
Answers (1)
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The figure below shows a strip of ticker tape pulled by a moving trolley. The ticker tape timer
was vibrating at 50Hz. Find the average velocity...
(Solved)
The figure below shows a strip of ticker tape pulled by a moving trolley. The ticker tape timer
was vibrating at 50Hz. Find the average velocity of the trolley.
Date posted:
April 10, 2019
.
Answers (1)
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The figure below shows an approximate velocity-time graph for a vehicle.
(Solved)
The figure below shows an approximate velocity-time graph for a vehicle.
Using the graph, determine;
a. The value of the acceleration in region BC
b. The total distance travelled
c. The average velocity for the whole journey
Date posted:
April 10, 2019
.
Answers (1)
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A car is brought to rest from 20m/s in 2 seconds. Determine
(Solved)
A car is brought to rest from 20m/s in 2 seconds. Determine
a. Its acceleration
b. The magnitude of acceleration
c. Its deceleration
Date posted:
April 10, 2019
.
Answers (1)
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A ship cruises 370 km towards east in in 10 hours. It then changes course southwards covering165 km in 5 hours. Determine
(Solved)
A ship cruises 370 km towards east in in 10 hours. It then changes course southwards covering
165 km in 5 hours. Determine
a. Total displacement of the ship.
b) The average speed of the ship.
c. The average velocity of the ship
Date posted:
April 10, 2019
.
Answers (1)
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The half-life of a radio-active substance is 138 days. A sample of the substance has 8 x 1010 un-decayed nuclei at time t = 0....
(Solved)
The half-life of a radio-active substance is 138 days. A sample of the substance has 8 x 1010 un-decayed nuclei at time t = 0. How many un-decayed nuclei will be left after 690 days?
Date posted:
April 5, 2019
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Answers (1)
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One of the application of Beta emission (B) is controlling thickness gauge. Explain
how they are used for this purpose?
(Solved)
One of the application of Beta emission (B) is controlling thickness gauge. Explain
how they are used for this purpose?
Date posted:
April 5, 2019
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Answers (1)
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Th disintegrates into radium (Ra) by emission of two alpha and two beta particles as in equation.
(Solved)
Th disintegrates into radium (Ra) by emission of two alpha and two beta particles as in equation.
State
i) The atomic number of the daughter nuclide
ii) The mass number of the daughter nuclide
Date posted:
April 5, 2019
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Answers (1)