1. A bus starting from rest moves
with a uniform acceleration of
0.1 m s2 for 2 minutes. Find (a)
the speed acquired, (b) the
distance travelled.
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Answers
Answered by
3
Answer:
Here we have, Initial velocity (u) = 0
Acceleration (a) = 0.1ms-2
Time (t) = 2 minute = 120 second
(a) The speed acquired:
We know that, v = u + at
⇒
v
=
0
+
0.1
m
/
s
2
×
120
s
⇒v=0+0.1m/s2×120s
⇒
v
=
120
m
/
s
⇒v=120m/s
Thus, the bus will acquire a speed of 120 m/s after 2 minute with the given acceleration.
(b) The distance travelled:
We know that,
s
=
u
t
+
1
2
a
t
2
s=ut+12at2
⇒
s
=
0
×
120
s
+
1
2
×
0.1
m
/
s
2
×
(
120
s
)
2
⇒s=0×120s+12×0.1 m/s2×(120s)2
=
1
2
×
1440
m
=
720
m
=12×1440m=720m
Thus, bus will travel a distance of 720 m in the given time of 2 minute.
Answered by
1
Answer:
a bus starting from rest moves
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