A body at rest has a mass of 3 kg. A force of 12 N acts on it for 2 s. Calculate its
(a) velocity attained and
(b) change in momentum.
Ans:
(a) 8ms
(b) 24 kg ms
Answers
Answered by
3
Answer:
Explanation:
mass of body, m = 4 kg
force on body, f = 12 N
time, t = 2s
.. f = ma
a = f/m
a = 12/3 = 4 m/s²
.. velocity = acceleration x time
v = at
v = 4 x 2= 8 m/s
.. momentum = mass x velocity
p = mv
p=3×8=24 kg .m/s
Answered by
0
Answer:
p= 48Kg .m/s
v = 16 m/s ..
Explanation:
mass of body, m = 3kg
force on body, f = 12N
time, t = 4 s
.. f = ma
a = f / m
a = 12/3 = 4m / (s ^ 2)
.. velocity = acceleration × time
V = at
v = 4 * 4 = 16m / s
.. momentum = mass × velocity
p = mv
p = 3 * 16 =48 Kg.m/s
by STM..
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