General Physics (PHYS2226)
Geology, Mining and Environmental Science - GENV
Semester: Second Semester
Level: 200
Year: 2019
REPUBLIC OF CAMEROON THE UNIVERSITY OF BAMENDA
Peace-Work-Fatherland
P. O. BOX 39 Bambili
End-of-Semester Examinations, 2018/2019
School/Faculty: SCIENCE Department:PHYSICS Lecturer(s):_Pr Tabod/Mr
Assembe.___
Course Code: _PHYS2226 Course Title: General Physics Semester: Second
Date: _03/07/2019_______Halls: __ ASANJI 1 Time: 10:30- 12:30
Instructions: Attempt all questions
QUESTION 1(4 marks)
Answer True (T) or False (F) to the following:
a)
The Sine of the angle between two perpendicular vectors is always zero
b)
A uniformly accelerated motion has a time varying acceleration
c)
The intensity of a uniform electric Held is the product of (he electric potential and the distance
d)
Two electric charges of different natures placed close together attract each other
e)
Energy is the work done by a physical system
f)
A medium with free negative charges can conduct electricity
g)
In dynamics, power corresponds to the rate of change of energy
h)
Newton’s 2
nd
law states that action and reaction are equal and opposite
QUESTION 2(8 marks)
1)
An electric potential, U, of 2300V is applied between two parallel horizontal plates separated by a
distance of 20 cm. The upper plate is positive and the lower one is negative. Calculate the
magnitude and represent the direction of the electric field E between the two plates 2 marks
2)
A moving point charge q = -10µC with a mass of 50 mg enters in the region between these two
plates at time 1=0 with an initial velocityV
0
= 25 ms
-1
that makes an angle =20° with the
horizontal axis midway between the plates. (The charge is repelled by the negative plate).
a)
Calculate the weight and the electric forces exerted upon the point charge. Compare the two
forces and conclude........................................................................................................3 marks
b)
Neglecting the weight, determine the acceleration and the position of the point charge in
motion at any time between the two plates 3 marks
QUESTION 3(8 marks)
The position of a moving point mass is given by the vector OM (t) = (4t
3
+l)i+(2+t
2
t-2t
3
)j in a Cartesian
coordinate system. The mass of the particle is 250 g and the motion is without friction.
a) Determine the acceleration. What type of motion is this? ................................. 3 marks
b) Calculate the average acceleration of the panicle between 4s and Is.................................. 2 marks
c) Calculate the distance covered in the same time interval .................................... 1 mark
d) What are the corresponding resultant force acting upon the particle and the work it does? 2 marks
END
www.schoolfaqs.net
