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WAEC Physics 2012 Paper
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© africaexams.com
Question : 17
Total: 47
A body is pulled through a distance of 500m by a force of 20N. If the power developed is 0.4kW, calculate the time for which the force acts
250.0s
25.0s
2.5s
0.5s
Validate
Solution:
Force x Distance = Power x Time
Time =
F
o
r
c
e
×
D
i
s
t
a
n
c
e
P
o
w
e
r
=
20
×
500
0.4
×
1000
= 25.0s
© africaexams.com
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