Post Utme Physics Past Questions and Answers

Question 1296:

Calculate the length of a displaced pendulum bob that passes its lowest point twice every second. $[g=10m{s}^{-2}]$

A. $1.000m$
B. $0.253m$
C. $0.450m$
D. $0.58m$

Question 1297:

When a ball rolls on a smooth level ground, the motion of its centre is ____________

A. Translational
B. Random
C. Oscillatory
D. Rotational

Question 1298:

A vehicle of mass $m$ is driven by an engine of power $P$ from rest. Find the minimum time it will take to acquire a speed $v$.

A. $m{v}^2/p$
B. $v^2/2p$
C. $mv/p$
D. $mv/2p$

Question 1299:

A box of mass $40Kg$ is being dragged along by the rope inclined at ${60}^{\circ }$ to the horizontal. The frictional force between the box and the floor is $100N$ and the tension on the rope is $300N$. How much work is done in dragging the box through a distance of $4m$ ?

A. $680J$
B. 200J
C. 100J
D. $400J$

Question 1300:

A body is projected from the earth's surface with the hope of letting it escape from the earth's gravitational field. What is the minimum escape velocity?
[Earth's radius $=$ $6.4\times {10}^{3}km,g=10m{s}^{-2}]$

A. $11.3km{s}^{-1}$
B. $13.3km{s}^{-1}$
C. $12.3km{s}^{-1}$
D. $14.3km{s}^{-1}$