Question #194541

1.     Two forces act on a parachutist during a drop. One force is the weight W(500N) of the parachutist. The other force is the upwards pull P(400N) from the parachute harness on the parachutist. The parachutist has a mass of 50 kg.


a.     What is the size of the unbalanced force acting on the parachutist?

b.     What is the acceleration of the parachutist?


1.     A boat engine produces a  force of 10000 N and the friction and water resistance total 3500 N.  If the mass of the boat is 2000 kg, what will be its acceleration?


1
Expert's answer
2021-05-17T13:31:51-0400

1.1.

F1=500;F2=400;m=50\vec F_1=500;\vec F_2=400;m = 50

a)F=F1+F2=500400=100a)\vec F =\vec F_1+\vec F_2=500-400 =100

b)F=mab)\vec F= m\vec a

a=Fm=10050=2\vec a = \frac{\vec F}{m}=\frac{100}{50}=2

Answer:F=100N;a=2ms2;\text {Answer:}\vec F=100N;\vec a = 2\frac{m}{s^2};

2.2.

F1=10000;F2=3500;m=2000\vec F_1=10000;\vec F_2=3500;m = 2000

F=F1+F2=100003500=6500\vec F =\vec F_1+\vec F_2=10000-3500=6500

F=ma\vec F= m\vec a

a=Fm=65002000=3.25\vec a = \frac{\vec F}{m}=\frac{6500}{2000}=3.25

Answer: a=3.25ms2;\text {Answer: }\vec a = 3.25\frac{m}{s^2};


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