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Common Questions Asked in Post UTME Physics Exams Day5
Physics
Chima Sunday (Tutor)
20-06-2016 15:54:00 +0000Try your best to solve these questions. Show working on paper when necessary and include a picture of your hand written Solution in your response. Wish you the best!
1. The angle between a plane mirror and an incident ray is 35. Find the angle of reflection
A. 35
B. 55
C. 45
D. 70
(uniben)Updated Solution
The angle between the normal and the plane mirror is 90, thus the incident angle = 90 - 35 = 55
From the laws of reflection, the angle of incidence = angle of reflection = 55
So answer is Option B2. A car of mass Mkg is accelerated uniformly from rest by an engine of power P. The minimum time it will take to attain a speed of V is
A. MVP
B. MV/2P
C. MV2/2P
D. MV2/P
(ABU)Updated Solution
recall that P = W/t
but W = F×d
F = ma = mv/t
W = mv/t×d = mv × d/t = mv2
so P = mv2/t
by subject formular t = mv2/P
So answer is Option D3. Which of the following is NOT a consequence of a force field?
A. Weight
B. Surface Tension
C. Gravitational Pull
D. Magnetic Force
E. Electric Force
(futo)Updated Solution
Force fields are non contact forces, they are induce in space and thus acts on any body that comes close to its vicinity, without necessarily touching it. Examples of such forces are the gravitational force which brings about gravitational pull and also gives weight to matter. Other examples includes the electric force and magnetic force.
But surface tension is a kind of force that only acts at the surface of liquid. It do not stretch through space, so it is not a non contact force.
The right Option is B
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Iorwar Pisky
A moral vechicle is brought to rest from a speed of 15m/s in 20s . Calculate the retardation
0 21-06-2016 12:49:00 +0000
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