Physics Past Questions and Answers

Question 4886:

A bullet leaves the barrel of a gun with a speed of $80ms$. If the barrel is 20 theng. Lindthe acceleration of the bullet.

A. $160m{s}^{\prime }$
B. 40ms'
C. $800m{s}^{\prime }$
D. $1600ms1$

Question 4887:

Sound and water waves are classified as mechanical waves and they carnotbe propagated in one of the following media

A. Air
B. Water
C. Steel
D. Vaccuum

Question 4888:

A capacitor of $2.0\times {10}^{-11F}$ and an inductor are joined in series. The value of the inductance that will give the circuit a resonant frequency of $200kHz$ is ____________

A. $\frac{1}{16}H$
B. $\frac{1}{8}H$
C. $\frac{1}{64}H$
D. $\frac{1}{32}H$

Question 4889:

A $70kg$ man ascends a flight of stairs of height $4m$ in $7s$, The power expended by the man is ____________

A. 40 W
B. 100 W
C. 280 W
D. 400 W

Question 4890:

A body accelerates uniformly from rest at $6m{s}^{-2}$ for $8sec-$ onds and then decelerates uniformly to rest in the next 5 seconds. The magnitude of the deceleration is ____________

A. $9.6m{s}^{-2}$
B. $48m{s}^{-2}$
C. $24.0m{s}^{-2}$
D. $39.2m{s}^{-2}$