Physics questions and answers

Physics Questions and Answers

If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.

1,601.

When a body is slightly tilted, it is found that its centre of gravity is slightly raised. What is the state of equilibrium of the body?

A.

unstable

B.

stable

C.

neutral

D.

cannot be determined

Correct answer is B

No explanation has been provided for this answer.

1,602.
1,603.

The time of flight for a projectile motion is given by the expression

A.

\(\frac{U sin \theta}{g}\)

B.

\(\frac{U sin \theta}{2g}\)

C.

\(\frac{2U sin \theta}{g}\)

D.

\(\frac{U sin 2\theta}{g}\)

Correct answer is C

No explanation has been provided for this answer.

1,604.

A bird flies at 10ms\(^{-1}\) for 3s, 15ms\(^{-1}\) for 3s and 20 ms\(^{-1}\) for 4s. Calculate the bird's average speed

A.

4.5 ms-1

B.

15.0 ms-1

C.

15.5 ms-1

D.

51.7 ms-1

Correct answer is C

Av. speed = \(\frac{3 \times 15 + 3 \times 10 + 4 \times 20}{3 + 3 + 4}\)

= 15.5 ms\(^{-1}\)

1,605.

Which of the following substances is the most volatile at room temperature?

A.

water

B.

diesel

C.

petrol

D.

kerosine

Correct answer is C

No explanation has been provided for this answer.