Answer:
GIVEN
u is 40m/s and v=60m/s
time is 4s
therefore acceleration =60-40/4
=20/4=5m/s^2
b)next 2 sec=70m/s
Since the mass is 5 grams the acceleration is: 4000 m/s^2
But if the mass is 5 Kilograms the acceleration is: 4 m/s^2
In Linear motion the swimmer swims
Answer:
Option E is the correct answer.
Explanation:
Velocity of boat = 10.8 m/s
Velocity of river = 2 m/s
Relative velocity upstream = 10.8 - 2 = 8.8 m/s
Displacement = Velocity x Time
1100 = 8.8 x t₁
Time in upstream, t₁ = 125 s
Relative velocity downstream = 10.8 + 2 = 12.8 m/s
Displacement = Velocity x Time
1100 = 12.8 x t₂
Time in downstream, t₂ = 86 s
Total time = t₁ + t₂ = 125 + 86 = 211 s
Option E is the correct answer.
