A farmer is lifting some moderately heavy rocks from a field to plant crops. He lifts a stone that weighs 180. What force does he apply if the stone accelerates at a rate of 1.5−2?
Answers
Answered by
3
Answer:
No forces act in the horizontal direction, so we can concentrate on vertical forces, as shown in the following free-body diagram. We label the acceleration to the side; technically, it is not part of the free-body diagram, but it helps to remind us that the object accelerates upward (so the net force is upward).
w
=
m
g
m
=
w
g
=
180
N
9.8
m/s
2
=
18
kg
∑
F
=
m
a
F
−
w
=
m
a
F
−
180
N
=
(
18
kg
)
(
1.5
m/s
2
)
F
−
180
N
=
27
N
F
=
207
N
=
210
N to two significant figures
w=mgm=wg=180N9.8m/s2=18kg∑F=maF−w=maF−
Answered by
0
Answer:
Explanation:
180.... What is the unit
Can u send me the photo of question
Similar questions