The drawing on the right shows a man (mass = 70kg) and the child (mass = 35 kg) push each other apart. The man moves away with a
speed of 0.3 m/s relative to the ice.
Calculate the velocity of the child relative to the ice.
LET MOMENTUM EQUATION GUIDE YOUR THINKING...
SHOW YOUR WORK - INCLUDE UNITS
Calculate the velocity of the child relative to the ice.
LET MOMENTUM EQUATION GUIDE YOUR THINKING...
SHOW YOUR WORK - INCLUDE UNITS
2 answers:
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Answer:
a) 20 seconds
b) No.
Explanation:
t = Time taken for jet to stop
u = Initial velocity = 100 m/s (given in the question)
v = Final velocity = 0 (because the jet will stop at the end)
s = Displacement of the jet (Distance between the moment the jet touches the ground to the point the point it stops)
a = Acceleration = -5.00 m/s² (slowing down, so it is negative)
a) Equation of motion
The time required for the plane to slow down from the moment it touches the ground is 20 seconds.
The distance it requires for the jet to stop is 1000 m so in a small tropical island airport where the runway is 0.800 km long the plane would not be able to land. The runway needs to be atleast 1000 m long here the runway on the island is 1000-800 = 200 m short.