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- State two factors on which the linear speed of a body moving in a circular motion depends.(Solved)
State two factors on which the linear speed of a body moving in a circular motion depends.
Date posted: May 31, 2019. Answers (1)
- A battery is rated 100AH. How long will it work if it steadily supplies a current of 2.5A(Solved)
A battery is rated 100AH. How long will it work if it steadily supplies a current of 2.5A
Date posted: May 31, 2019. Answers (1)
- A column of glycerine 8.20m high, a column of sea water 10.08m high, column of mercury 0.76m high and a column of fresh water 10.34m...(Solved)
A column of glycerine 8.20m high, a column of sea water 10.08m high, column of mercury 0.76m high and a column of fresh water 10.34m high exert the same pressure at the bottom of the container.Given that the pressure exerted by a fluid is given by P = h g, arrange these liquid in decreasing order of their densities.
Date posted: May 31, 2019. Answers (1)
- 5 images are formed when two mirrors are inclined at an angle between them. Determine the angle of inclination.(Solved)
5 images are formed when two mirrors are inclined at an angle between them. Determine the angle of inclination.
Date posted: May 31, 2019. Answers (1)
- The figure below shows a metal sphere of mass 2kg moving along a smooth horizontal surface PQ, with a steady speed of
4m/s.
a) Explain why the...(Solved)
The figure below shows a metal sphere of mass 2kg moving along a smooth horizontal surface PQ, with a steady speed of
4m/s.
![5312019909.png](/questions/uploads/5312019909.png)
a) Explain why the speed of the sphere decreases as it moves up along QR.
b) If the sphere reaches R with a speed of 1.0m/s, calculate the change in its K.E from Q to R.
Date posted: May 31, 2019. Answers (1)
- A stone of mass 450g is rotated in a vertical circle at 3 revolutions per second. If the string has a length of 1.5m,
determine:
(i) the...(Solved)
A stone of mass 450g is rotated in a vertical circle at 3 revolutions per second. If the string has a length of 1.5m,
determine:
(i) the linear velocity
(ii) The tension of the string at positions A and B.
Date posted: May 31, 2019. Answers (1)
- A mass of wax of 1kg was heated uniformly by a 100W heating element until it melted. The graph below shows how the temperature of...(Solved)
A mass of wax of 1kg was heated uniformly by a 100W heating element until it melted. The graph below shows how the temperature of the wax varies with time.
![fig173152019906.png](/questions/uploads/fig173152019906.png)
(i) Explain what is happening in the region.
AB
BC
(ii) Calculate the specific heat capacity of the wax.
(iii) Calculate the specific latent heat of fusion of wax.
Date posted: May 31, 2019. Answers (1)
- The figure below shows a model of a spray gun. When air is blown in the direction shown, a spray is observed. Explain this observation.(Solved)
The figure below shows a model of a spray gun. When air is blown in the direction shown, a spray is observed. Explain this observation.
![5312019905.png](/questions/uploads/5312019905.png)
Date posted: May 31, 2019. Answers (1)
- An external force applied to a ball of mass 160g increases its velocity from 25cm/s to 275cm/s in 10 seconds. Calculate the
force applied.(Solved)
An external force applied to a ball of mass 160g increases its velocity from 25cm/s to 275cm/s in 10 seconds. Calculate the
force applied.
Date posted: May 31, 2019. Answers (1)
- The figure shows a simple pendulum oscillating between Y and Z
State the type of energy the body passes at
(i) Position y
(ii) Position x(Solved)
The figure shows a simple pendulum oscillating between Y and Z
![fig143152019858.png](/questions/uploads/fig143152019858.png)
State the type of energy the body passes at
(i) Position y
(ii) Position x
Date posted: May 31, 2019. Answers (1)
- The sketches in the figure below shows the variation of extension with force for springs A and B.
Given that the spring A and B are...(Solved)
The sketches in the figure below shows the variation of extension with force for springs A and B.
![5312019856.png](/questions/uploads/5312019856.png)
Given that the spring A and B are of equal lengths, state any two factors that can be used to explain the difference in the
graphs.
Date posted: May 31, 2019. Answers (1)
- Two equal masses travel towards each other on a frictionless air track at speeds of 60cm/s and 40cm /s. They stick together on impact.
What is...(Solved)
Two equal masses travel towards each other on a frictionless air track at speeds of 60cm/s and 40cm /s. They stick together on impact.
![fig133152019854.png](/questions/uploads/fig133152019854.png)
What is the velocity of the masses after impact?
Date posted: May 31, 2019. Answers (1)
- The figure below shows a solid cone standing on a horizontal surface. The cone is in unstable equilibrium.
On the horizontal space provided, sketch the cone...(Solved)
The figure below shows a solid cone standing on a horizontal surface. The cone is in unstable equilibrium.
![5312019851.png](/questions/uploads/5312019851.png)
On the horizontal space provided, sketch the cone in neutral equilibrium.
Date posted: May 31, 2019. Answers (1)
- A jet fighter moving horizontally at a speed of 200m/s at a height of 2km above the ground is to drop a bomb to hit...(Solved)
A jet fighter moving horizontally at a speed of 200m/s at a height of 2km above the ground is to drop a bomb to hit a target on the ground. How long does the bomb stay in air after release before it hit the target?
Date posted: May 31, 2019. Answers (1)
- The figure below shows a uniform rule AB of length 1.0m and weight 1.2N. The system is in equilibrium.
Determine the weight of X.(Solved)
The figure below shows a uniform rule AB of length 1.0m and weight 1.2N. The system is in equilibrium.
![5312019840.png](/questions/uploads/5312019840.png)
Determine the weight of X.
Date posted: May 31, 2019. Answers (1)
- The graph below shows the variation of force with distance for a body being towed.
Calculate the total work done on the body.(Solved)
The graph below shows the variation of force with distance for a body being towed.
![fig113152019844.png](/questions/uploads/fig113152019844.png)
Calculate the total work done on the body.
Date posted: May 31, 2019. Answers (1)
- Two gear wheel have a 80 teeth (driven) and 20 teeth (driving) and lock with each other. They are fastened on axles of
equal diameters such...(Solved)
Two gear wheel have a 80 teeth (driven) and 20 teeth (driving) and lock with each other. They are fastened on axles of
equal diameters such that a weight of 150N attached to a string round one axle will just raise 450N on the other axle.
Calculate
(i) M.A
(ii) V.R
(iii) Efficiency of the machine.
Date posted: May 31, 2019. Answers (1)
- What is a machine?(Solved)
What is a machine?
Date posted: May 31, 2019. Answers (1)
- The figure below shows a master cylinder sealed at one end. Instead of brake fluid, the cylinder contains air.
When a force is applied to the...(Solved)
The figure below shows a master cylinder sealed at one end. Instead of brake fluid, the cylinder contains air.
![fig83152019836.png](/questions/uploads/fig83152019836.png)
When a force is applied to the piston, the length d changes from 6.0cm to 4.0cm. The pressure of the air increases but the temperature stays constant.
(i) Describe how the molecules of air exert a pressure.
(ii) Explain why the pressure increases even though the temperature stays constant.
(iii) The initial pressure of the air inside the cylinder is 1.0 x 105 pa. Calculate the final pressure of the air.
Date posted: May 31, 2019. Answers (1)
- State one advantage of alcohol thermometer over mercury thermometer.(Solved)
State one advantage of alcohol thermometer over mercury thermometer.
Date posted: May 31, 2019. Answers (1)