If S= 2t^2+3t-2 Find velocity and acceleration
Answers
Answer❣
Question :
An object travels 20m in 4s and then other 20m in 10s . What is the average speed of the object ?
Solution :
As per the question we have two cases so let's assume each as Case 1 and Case 2 respectively !
Case 1 :
Distance Covered : 20m
Time taken : 4 sec
Speed : Distance / time
: 20 / 4
: 5 m / sec
Case 2 :
Distance Covered : 20 m
Time taken : 10 sec
Speed : Distance / time
: 20 / 10
: 2 m / sec
huge average speed = total distance total time
averagespeed=totaltimetotaldistance
= \5 + 2 4 + 10=4+105+2
= 7 40 = 0.175=407=0.175
Hence , the average speed of the object is 0.175 m / sec !!
Answer:
Correct option is
B
18m/s
correct answer is B.
a=3t
2
+2t+2
dv=adt
v=
3
3t
3
+
2
2t
2
+2t
v=t
3
+t
2
+2t
at t=0,u=2
att=2
v=t
3
+t
2
+2t+2
=8+4+2×2+2
=8+4+4+2
=18m/s
Step-by-step explanation:
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