1) The velocity of a vehicle decreased from 30m/sec. to 15m/sec. in 5 seconds. What is the acceleration?
a) -4m/sec2 c) 2m/sec2
b) -3m/sec2 b) 1.5m/sec2
2) Periodic motions are---
i) Watch spines motion
ii) Electric fans motion
iii) Table's drawer motion
Which one is correct?
a) i,ii b) i,iii c) ii,iii d) i,ii,iii
Answers
Answered by
1
Answer:
u = 30m/s
v = 15m/s
t = 5s
a = v-u/t
a = 15-30/5
a = -15/5
a = -3m/s² ( Option B)
For the second question Option A is correct.
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Answered by
1
Answer:
1) b
2) a
Explanation:
1) a=v-u/t
= 30-15/5
= 15/5
= 3
Velocity decreases so it is negative acceleration
So, -3 m/sec² is correct
Hope it helps
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