A helicopter lifts a swimmer (mass 75 kg) out of the sea with a rope.
2.1 Why should the helicopter take off slowly? Use a Physics principle to explain
your answer.
2.2 Calculate the magnitude of the tension in the rope as the helicopter accelerates upwards at 0,5 m/s2.
Answers
Answered by
2
Answer:
The mass of the helicopter is
m
1
=
5500
k
g
The mass of the car is
m
2
=
1200
k
g
The upward acceleration of the helicopter is
a
=
0.5
m
s
−
2
The acceleration due to gravity is
g
=
9.8
m
s
−
2
Let the lift force be
=
F
N
Resolving in the upwards direction
↑
⏐
⏐
+
According to Newton's Second Law
F
−
(
m
1
+
m
2
)
g
=
(
m
1
+
m
2
)
a
F
=
6700
(
9.8
+
0.5
)
=
69010
N
Let the tension in the cable be
=
T
N
Resolving in the upwards direction
↑
⏐
⏐
+
T
−
m
2
g
=
m
2
a
T
=
m
2
(
g
+
a
)
=
1200
⋅
(
9.8
+
0.5
)
=
12360
N
Answered by
0
12360 Newton
Explanation:
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