Field Theory Answers

Find the mass of an object whose rest mass is 1000g when it is travelling at 90% of the speed of light?

Reflect on your learning as follows:

1. What problems did you encounter in completing your assignment activities and how 

did you solve them?

2. Are there activities that you should consider continuity in this module?

3. Are there activities that you think should not be part of this module?

4. If you could do more work on this module, what would you do better? Motivate.

5. What do you expect the lecturer to do when assessing your work? Motivate.

6. How does this relate to what you have learnt?

7. What do you need to learn more in order to improve your work?

8. Of the content covered in this module, what do you feel most confident about? 

Specify the sections and or units.

9. What aspects of the module do you still not understand well? 

10. What are your recommendations towards the improvement of the module in future?

1.1. Give the analyses of the two dominant systems you would wish to install in your 

workshop. (4)

1.2. State with reasons the difference that exist between the systems in 1.1. (4)

1.3. Which system in 1.1 mostly applicable to the car breaks? (2)

1.4. Describe the process of fitting the breaking systems in a car. (4)

1.5. As in 1.4, why is it so important to have all traces of air eliminated from 

the system? (3)

1.6. Evaluate in not less than 8 points how you will ensure safety rules on the use 

of tools in your workshop. (8)

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QUESTION 2

An employer or a user of electricity must provide a clear space for operating and 

maintenance staff at the back and front of all switchboards. The space behind a 

switchboard should be kept closed and locked at all times and should only be 

accessed for the purpose of inspection or repairs. Evaluate the cases in which the 

requirements regarding the clear space at the back of the switchboard is not 

applicable.

a horizontal force of 0.80N is required to pull a 5kg block across a table top at a constant speed. with the block initially at rest, a 20g bullet fired horizontally into the block causes the block to slide 1.5m before coming to rest again. determine the speed v of the bullet where the bullet is assumed to be embedded in the block

a planet with mass M uses 12 lines of fields diagram

2. A Positive electric charge Q is distributed uniformly throughout the volume of an insulating solid sphere with radius a (Figure 2). By using Gauss Law, find the magnitude of the electric field at a point P, a distance r from the center of the sphere where:

a) r𝑟 <a 𝑎 (10 points) 

b)r>a

The largest mall in Africa by volume is Mall of Africa, South Africa. It measures approximately 631 m long, 707 yards wide, and 110 ft high. Calculate its volume in cubic meter. 

1 m = 3.28 ft ; 1 yard = 0.9 m )

A truck travelling at 54 km/h is slow down to 36 km/h in 10 sec. Find the retardation

A baseball was hit at 45 m/s at ang angle of 45 degrees above the horizontal

a.How long did it remain in the air

b.How far did it travel horizontally

Given that a positive charge Q1=+3c and negative charge Q2=2c, are separated by a distance of 8cm. Take permittivity constant k=9.0×10^9NM^2/c^2.

(a). find The electric field at point p 1cm from Q2

(b) what is the electric potential at point P ,5 cm from Q1.