Post Utme Physics Past Questions and Answers

Question 1251:

A mass of $0.5kg$ is attached to one end of a helical spring and produces an extension of $2.5cm$. The mass now set into vertical oscillation of amplitude $10mm$. The period of oscillation is ____________
$(g=10m/s^2)$

A. $0.33$ s
B. $100s$
C. $200s$
D. $280s$

Question 1252:

A boat is passing under a bridge. The deck of the boat is $15m$ below the bridge. A small package is to be dropped from the bridge onto the deck of the boat when the boat is $25m$ from just below the drop point. What (boat) speed is necessary to have the package land in the boat?
$(g=9.8m/s^2)$

A. $17m/s$
B. $14m/s$
C. $1.7m/s$
D. $4.9m/s$

Question 1253:

An $0.60kg$ rubber stopper is whirled in a horizontal circle of $0.80m$ radius at a rate of $3.0$ revolutions per second. What is the tension in the string?

A. $14N$
B. 80 N
C. 170N
D. 24 N

Question 1254:

An automobile is traveling at $60km/hr$. Calculate the angular velocity of the $0.35m$ radius wheels.

A. $16.67rad/s$
B. $47.6rad/s$
C. $21rad/s$
D. $171.4rad/s$

Question 1255:

An air bubble at the bottom of a lake has a volume of 20 $c{m}^3$, pressure of $4.9Pa$, and temperature $4^{\circ }C$. The bubble rises to the surface where the temperature is ${20}^{\circ }C$ and the pressure $1.0Pa$. Find the volume as the bubble reaclies the surface. (Take $1atm=1,0\times {10}^{5}N/m^2$ ).

A. $124c{m}^3$
B. 319 $c{m}^3$
C. $60c{m}^3$
D. $104c{m}^3$