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.

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3,591.

Which of the following is a derived unit?

Metre

Coulomb

Kilogram

Second

Ampere

View answer & explanation

Correct answer is B

No explanation has been provided for this answer.

3,592.

The motion of the prongs of the sounding tuning fork is

random

translational

rotational

vibratory

vibratory and rotational

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

3,593.

A stone tied to a string is made to revolve in a horizontal circle of radius 4m with an angular speed of 2 rad per sec. With what tangential velocity will the stone move off the circle if the string is cut?

16.0 ms^-1

8.0 ms^-1

6.0 ms^-1

2.0 ms^-1

0.5 ms^-1

View answer & explanation

Correct answer is B

V = wr = 2x4 = 8.0 ms^-1

3,594.

A piece of cork floating on water is acted upon by the forces of...

Weight and viscosity

weight and upthrust

upthrust and viscosity

weight only

upthrust only

View answer & explanation

Correct answer is B

No explanation has been provided for this answer.

3,595.

A block of material of volume 20cm^-3 and density 2.5gcm^-3 is suspended from a spring balance with half the volume immersed in water. What is the reading of the spring balance? (Density of water = 1.0gcm^-3).

25g

30g

40g

50g

View answer & explanation

Correct answer is D

W = pvg = (2.5 x 10 x 60)/100 = 0.500N.
Upthrust = wt of liquid displaced = pvg water.
pvg water = (1x20x10)/2 = 0.10N
Reading => 0.500N - 0.100N = 0.4N = 40g