Fundamentals of Applied Physics (GSDR2115)

Higher Institute of Transport and Logistics (HITL)

Semester: First Semester

Level: 200

Year: 2015

Answers (200 )
School/Faculty: HITL DEPARTMENT: General Studies TURER(S): Dr. G. Fautso Kuiate
COURSE CODE: TL1110 COURSE TITLE: Fundamentals of Applied Physics
DATE: 18-05-2015 HALL: PBC(2&3) TIME: 8:00 – 11:00
Instructions: Answer all questions.
THE UNIVERSITY OF BAMENDA
P.O BOX 39 Bambili
REPUBLIC OF CAMEROON
Peace-Work-Fatherland
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. 17 0
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Problem 1: (15 MARKS)
An airplane begins its take-off run at A with zero velocity and a constant acceleration a. knowing
that it becomes airborne 30s later at B and that distance AB is 2700 ft, determine (a) the
acceleration a, (b) the take-off velocity v
B
.
Problem 2: (15 MARKS)
Two train whistles A and b, each having a frequency of 400Hz. A is stationary and B is moving
toward the right (away from A) at a speed V
B
= 45m/s. A listener is between the two whistles and
is moving toward the right with a speed VL = 25m/s
a) What is the frequency from A as heard by the listener? b) What is the frequency from B
as head by the listener c) Calculate the frequency shift in parts (a) and (b). Assume the
speed of sound in air is 343m/s
Problem 3: (10 MARKS)
1. In both the MLT systems of dimensions, state the dimensions on the following: work,
Torque, power, linear momentum, velocity
2. Give the SI units and the BG units of each of the above mentioned quantities
Problem 4: (15 MARKS)
Two automobiles A and B travelling in the same direction in adjacent lanes are stopped at traffic
signal. As the signal turns green, automobile A accelerates at a constant rate of 6.5 ft/s
2
. Two
seconds later, automobile B starts and accelerates at a constant rate of 11.7 ft/s
2
. Determine
(a) when and where B will overtake A, (b) the speed of each automobile at that time
Problem 5: (15 MARKS)
A motorist is travelling on a curve section of highway of radius 2500 ft at the speed of 60 mi/h.
The motorist suddenly applies the brakes, causing the automobile to slow down at a constant
rate. Knowing that after 8s the speed has been reduced to 45mi/h; determine the acceleration of
the automobile immediately after the brakes have been applied.
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