Post Utme Physics Past Questions and Answers

Question 1041:

A solid weighs \(0.040 N\) in air and \(0.024 N\) when fully immersed in a hapuid of density \(800 kgm\). Calculate the volume of the solid \(( g =10 ms 2)\)

A. \(2.0 \times 10^{-6} m ^{3}\)
B. \(2.5 \times 10^{-6} m ^{3}\)
C. \(3.0 \times 10^{-6} m ^{3}\)
D. ( \(2.0 \times 10^{-8} m ^{-5}\)

Question 1042:

A body of mass \(5 kg\) starts from rest and is acted upon by a force \(100 N\), the acceleration in \(ms ^{2}\) and final velocity after 10secs will be

A. \(20 ms ^{2}, 20 ms 1\)
B. \(25 ms ^{2}, 250 ms \)
C. \(20 ms ^{2} 200 ms ^{4}\)
D. \(10 ms ^{2} 300 ms ^{-4}\)

Question 1043:

All these are true about impulsê except

A. Change in momentum of a hody
B. Its unit is \(Ns\)
C. Product of force and time,
D. Change in acceleration of a body

Question 1044:

A car of mass \(100 kg\) moves at a constant speed of \(20 m / s\) along a horizontal road where the friction force is \(200 N\).
Calculate the power developed by the engine.

A. 2000 watt
B. 3000 watt
C. 4000 watt
D. 5000 watt

Question 1045:

According to Newtoris second law of motion:

A. Mamentum is proportional to force action
B. A raction is equal to reaction but in the opposite direction
C. Impulseforce is inversely proportional to time
D. Force is proportional to rate of change of momentum