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Common Questions Asked in Post UTME Physics Exams Day2
Physics
Chima Sunday (Tutor)
31-05-2016 11:54:00 +0000Try your best to solve these questions. Show working on paper and include a picture of your hand written Solution in your response. Happy Solving!
1. A body of mass 20kg, moving with uniform acceleration has an initial momentum of 200kgm/s after 10s, the momentum is 300kgm/s. What is the acceleration of the body?
A. 0.5ms-2
B. 1.0ms-2
C. 2.5ms-2
D. 2.0ms-2
(Unilag Post UTME)Updated Solution
recall that F = m(v - u)/t
F = ma
thus mat = m(v - u) = mv - mu
where mv = final momentum and mu = initial momentum
therefor mat = 300 - 200 = 100
by subject formular a = 100/mt = 100/20 * 1/10 = 0.5ms-2
Answer is Option A2. Two bodies P and Q are projected on the same horizontal plane, with the same initial speed but a different angles of 30o and 60o respectively to the horizontal, neglecting air resistance, what is the ratio of the range of P to that of Q?
Cheers!
A. 1:1
B. 1:√3
C. √3:1
D. 1:2
(O.A.U Post UTME)Updated Solution
RP = u2sin2θ1/g
RQ = u2sin2θ2/g
so RP/RQ = u2sin2θ1/g ÷ u2sin2θ2/g
thus RP/RQ = sin2θ1/sin2θ2
but θ2 = 60 and θ1 = 30
so that RP/RQ =sin60/sin120 = 1/1 = 1:1
Answer is Option A
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busari Yusuf
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1 31-05-2016 13:08:00 +0000
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Chima Sunday (Tutor)
An Updated answers with detailed solutions of the above questions have been provided. So try and check it up
1 13-06-2016 13:04:00 +0000
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