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.

2,096.

Which of the following equations represents the distance x, travelled by a body moving on a straight road with a constant speed? [The other symbol have their usual meanings]

A.

x = Ut + \(\frac{1}{2}t^2\)

B.

x = Ut

C.

x = \(\frac{V^2 - U^2}{2a}\)

D.

x = -\(\frac{1}{2} at^2\)

Correct answer is B

No explanation has been provided for this answer.

2,097.
2,098.

The apparent weight of a body fully immersed in water is 32N and its weight in air is 96N. Calculate the volume of the body. [Density of water = 1000kgm-3, g = 10ms-2]

A.

8.9 x 10-3m3

B.

6.4 x 10-3m3

C.

3.2 x 10-3m3

D.

3.0 x 10-3m3

Correct answer is B

Upthrust = 96 - 32 = 64N

mass(m) = \(\frac{64}{10} = 6.4 kg\)

volume = \(\frac{mass}{Density} = \frac{6.4}{1000}\)

= 6.4 x 10-3m3

2,099.

Which of the following statements about pressure is not correct? pressure

A.

increases with an increase in surface area

B.

decreases with an increase in surface area

C.

increases with a decrease in surface area

D.

increases with an increase in the applied force

Correct answer is A

No explanation has been provided for this answer.