by Sunday | Nov 14 | Physics JAMB
A. 4m² B. 8m² C. 2m² D. 1m² Correct Answer: Option A Explanation Pressure developed in the effort piston = F/a ∴F/a = 40/0.4 = 400/4 = 100Nm2 this pressure is transmitted to the larger piston of area A; => P = F/A ∴ 100 = 400/A => A = 400/100 =...
by Sunday | Nov 14 | Physics JAMB
I. Jet-propelled aircraft II. Rocket propulsion III. The recoil of a gun IV. A person walking A. I and II only B. I, II, III, and IV only C. I and III only D. I, II and III only Correct Answer: Option B – I, II, III, and IV...
by Sunday | Nov 14 | Physics JAMB
A. 1500N B. 500N C. 4166N D. 750N Correct Answer: Option A – 1500N Explanation efficiency = (M.A / V.R) x 100/1 => 60/100 = M.A/5 ∴M.A = (60 X 5) / 100 = 3 But M.A = Load/Effort; => 3 = Load/500 ∴Load = 500 x 3 =...
by Sunday | Nov 14 | Physics JAMB
A. 144J B. 162J C. 81J D. 72J Correct Answer: Option B = 162J Explanation K.E = 1/2MV2 Force, F = ma => a = F/m = 12/4 = 3ms-2 But a = (V-U) / t => V = u + at If the initial velocity U = 0, then V = at = 3 x 3 = 9ms-2 ∴ K.E, = 1/2ms-2 1/2 4 x 9 x 9 =...
by Sunday | Nov 14 | Physics JAMB
A. intersect at the angle 45° B. intersect at the angle 60° C. be parallel D. be perpendicular Correct Answer: Option C – be parallel
by Sunday | Nov 14 | Physics JAMB
A. square steel ring B. triangular zinc ring C. soft iron ring D. loop of copper wire Correct Answer: Option C – soft iron ring Explanation In order to protect material from the influence of an external magnetic field, the material is placed in a soft iron ring,...
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