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Standard VII
Physics
Question
Which of the following is/are true about acceleration
Acceleration is defined as the rate of change of velocity.
Its SI unit is
m
/
s
2
.
Negative acceleration is called retardation
All the above.
A
Negative acceleration is called retardation
B
Acceleration is defined as the rate of change of velocity.
C
Its SI unit is
m
/
s
2
.
D
All the above.
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Solution
Verified by Toppr
Acceleration =
F
i
n
a
l
v
e
l
o
c
i
t
y
−
I
n
i
t
i
a
l
v
e
l
o
c
i
t
y
t
i
m
e
Its SI unit is =
m
s
−
1
/
s
=
m
/
s
2
A negative acceleration acts opposite to the direction of motion of object and it reduces the velocity , it called retardation.
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