study the speed time graph of a body given below and answer the following question...
1. what is retardation at 40 seconds
2. what is the distance travelled by the body in last 20 seconds
3. what is the average speed of the body
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1- Solve
Retardation = ?
Time = 40Sec
V = 0 M/Sec
U = 40M/Sec
V=U+AT
0=40+A×40
0=40+40A
40A = -40
A = -1M/Sec²
2-Solve
S=?
Time =20Sec
V= 40M/Sec
U= 0M/Sec
A=?
For Finding Acceleration
V=U+AT
40=0+A×20
40 = 20A
20A = 40
A = 2M/Sec²
Now For. Finding Distance
V²=U²+2AS
(40)² = 2×2*S
1600 = 4S
4S = 1600
S = 400Meter Ans
3- Solve
Total Speed = Total Distance / Total Time
Total Speed = 400/40
= 10M/Sec Ans
Retardation = ?
Time = 40Sec
V = 0 M/Sec
U = 40M/Sec
V=U+AT
0=40+A×40
0=40+40A
40A = -40
A = -1M/Sec²
2-Solve
S=?
Time =20Sec
V= 40M/Sec
U= 0M/Sec
A=?
For Finding Acceleration
V=U+AT
40=0+A×20
40 = 20A
20A = 40
A = 2M/Sec²
Now For. Finding Distance
V²=U²+2AS
(40)² = 2×2*S
1600 = 4S
4S = 1600
S = 400Meter Ans
3- Solve
Total Speed = Total Distance / Total Time
Total Speed = 400/40
= 10M/Sec Ans
Shaskhi:
please tell the average speed also
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