A car decelerates from a speed of 20 m/s to rest in a distance of 100 m .What was its acceleration ,assume constant ?
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3
as, v² -u² = 2as
u= 20 m/s
v= 0
s = 100 m
⇒(0)²- (20)² = 2a×100
⇒200a = - 400
⇒a = - 2 m/s²
negative shows that it is being retarded.
u= 20 m/s
v= 0
s = 100 m
⇒(0)²- (20)² = 2a×100
⇒200a = - 400
⇒a = - 2 m/s²
negative shows that it is being retarded.
Answered by
1
Given,
u= 20 m/s
v= 0
s = 100 m
We know that
v² -u² = 2as
By implying values,we get
⇒(0)²- (20)² = 2a×100
⇒200a = - 400
⇒a = - 2 m/s²
u= 20 m/s
v= 0
s = 100 m
We know that
v² -u² = 2as
By implying values,we get
⇒(0)²- (20)² = 2a×100
⇒200a = - 400
⇒a = - 2 m/s²
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