plz solve third and first question...
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1.
v ∝ f
v1 / v2 = f1 / f2
v2 = v1 × (f2 / f1)
v2 = 340 × (2000 /1000)
v2 = 680 m/s
_______________
2.
u = 72 kmph = 72 × 5/18 = 20 m/s
v = 52 kmph = 54 × 5/18 = 15 m/s
a = (v - u) / t
a = (15 - 20) / 2
a = -2.5 m/s^2
F = ma
F = 800 × 2.5
F = 2000 N
v ∝ f
v1 / v2 = f1 / f2
v2 = v1 × (f2 / f1)
v2 = 340 × (2000 /1000)
v2 = 680 m/s
_______________
2.
u = 72 kmph = 72 × 5/18 = 20 m/s
v = 52 kmph = 54 × 5/18 = 15 m/s
a = (v - u) / t
a = (15 - 20) / 2
a = -2.5 m/s^2
F = ma
F = 800 × 2.5
F = 2000 N
chiragverma:
in 2nd mass is 800kg given
Answer edited.
ok
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