WAEC Physics Past Questions & Answers - Page 143

711.

A body moving with an initial velocity U accelerates until it attains a velocity of V within a time t. The distance, s covered by the body is given by the expressions

A.

s = (\(\frac{v - u}{2}\))t

B.

s = (\(\frac{v + 2u}{2}\))t

C.

s = (\(\frac{v + u}{2}\))t

D.

s = (\(\frac{2v + u}{2}\))t

Correct answer is C

No explanation has been provided for this answer.

712.

The term rectilinear acceleration means the rate of increase of

A.

velocity along a circular path in a unit time

B.

distance along a rectangular path in a unit time

C.

displacement along a straight-line path in a unit time

D.

velocity along a straight-line path in a unit time

Correct answer is D

No explanation has been provided for this answer.

713.

An object of mass 2 kg moves with a uniform speed of 10ms-1 for 5s along an straight path. Determine the magnitude of its acceleration

A.

0 ms-2

B.

1 ms-2

C.

3 ms-2

D.

4 ms-2

Correct answer is A

a = \(\frac{v - u}{t} = \frac{10 - 10}{5} = 0\)m/s

714.

A body moving at a constant speed accelerates when it is in

A.

rectilinear motion

B.

translational motion

C.

circular motion

D.

vibrational motion

Correct answer is A

No explanation has been provided for this answer.