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.

1,596.

The S.I unit of heat is

A.

joule

B.

kelvin

C.

watt

D.

ampere

Correct answer is A

Heat is a form of energy (heat energy). The S.I unit of energy generally is Joules (J).

1,597.

A girl stands on a scale in a lift. If the reading on the scale is less than her weight, then the lift is moving

A.

upward at uniform speed

B.

upward with uniform acceleration

C.

downward with uniform speed

D.

downward with uniform acceleration

Correct answer is D

No explanation has been provided for this answer.

1,598.

A resultant force of magnitude 15N acts on a body of mass 250g. Calculate the magnitude of the acceleration

A.

0.06 ms-2

B.

3.75ms-2

C.

16.67ms-2

D.

60.00ms-2

Correct answer is D

a = \(\frac{F}{M} = \frac{15}{0.25} = 60\)

1,599.

The tendency for a stationary body to continue to remain at rest when a force is applied to it is known as

A.

friction

B.

impulse

C.

inertia

D.

momentum

Correct answer is C

No explanation has been provided for this answer.

1,600.

A simple pendulum makes 50 oscillations in one minute. Determine its period of oscillation

A.

0.02s

B.

0.83s

C.

1.20s

D.

50.00s

Correct answer is C

T = \(\frac{t}{n} = \frac{60}{50} = 1.2\)