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.

1,856.

A car accelerates uniformly from rest at 5 ms-2. Determine its speed after 10s

A.

50.0ms-1

B.

25.0ms-1

C.

2.0ms-1

D.

0.5ms-1

Correct answer is A

V = u + at = 0 + 5 x 10 = 50m/s2

1,857.

Uniform speed occurs when there is equal change of

A.

distance in equal times

B.

displacement in equal times

C.

velocity in equal times

D.

acceleration in equal times

Correct answer is A

No explanation has been provided for this answer.

1,859.

A body is rotating in a horizontal circle of radius 2.5m with an angular speed of 5 rad s-1. Calculate the magnitude of the radial acceleration of the body

A.

62.50ms-2

B.

31.25ms-2

C.

12.50ms-2

D.

10.00ms-2

Correct answer is C

\(\alpha = \frac{W_2 - W_1}{t} = \frac{5}{1} = 5 rad\)/s2

9 = \(\alpha\)r

= 5 x 2.5 = 12.50m\s2

1,860.

An object is said to undergo oscillatory motion when it moves

A.

in an erratic manner

B.

to and fro about a fixed point

C.

in a circular path

D.

along a continuous path from the starting point

Correct answer is B

No explanation has been provided for this answer.