Question

In: Physics

A 70 kg person is parachuting and experiencing a downward acceleration of 1.9 m/s2. The mass...

A 70 kg person is parachuting and experiencing a downward acceleration of 1.9 m/s2. The mass of the parachute is 4.1 kg. (a) What is the upward force on the open parachute from the air? (b) What is the magnitude of the downward force on the parachute from the person?

Solutions

Expert Solution

Net mass

Net force

(a) Upward force on the open parachute

(b)

Downward force due to person

where m is mass of person


Related Solutions

An object with a mass of 4.15 kg undergoes an acceleration of 2.7 m/s2 for a...
An object with a mass of 4.15 kg undergoes an acceleration of 2.7 m/s2 for a period of 8.0 s. It then undergoes an acceleration of -3.2 m/s2 for a period of 20.0 s If the initial velocity of the object is 6.01 m/s and it first experiences the acceleration when it is at the origin, plot by hand on graph paper (to scale) the force, velocity, and position as functions of time. Explain why your graphs look the way...
A person with mass m= 70 kg takes the elevator to the top of the Empire...
A person with mass m= 70 kg takes the elevator to the top of the Empire State Building at a height of 300 m. Assum the elevator takes 1 min to reach the top of the building (a) Find the work done on the person by gravity during the elevator ride? (b) Find the amount of work the normal force of the floor did on the person. (c) Find the average power of the force of gravity.
On a planet, the acceleration due to gravity is only 7.2 m/s2. A person living on...
On a planet, the acceleration due to gravity is only 7.2 m/s2. A person living on that planet throws a football at 10 m/s at an angle of 48 degrees to the horizontal. The person is standing, so the ball launches from an initial height of 1.8 meters above the ground. (Ignore any air resistance here.) What maximum height from the ground would the ball reach? What would be the flight time before the ball gets back to the ground?
A 480 kg horse pulls a 260 kg cart with a constant acceleration of 0.800 m/s2....
A 480 kg horse pulls a 260 kg cart with a constant acceleration of 0.800 m/s2. Assume the only force acting on the horse comes from the cart pulling on it. (a)What force does the horse extert on the cart? ______ N (b)What force does the cart exert on the horse? _______N (c)What is the net force acting on the horse? ______N
An object of 4 kg (assuming the acceleration of gravity g = 10 m / s2...
An object of 4 kg (assuming the acceleration of gravity g = 10 m / s2 ) suspended from a spring causes the spring to stretch 2 cm downwards. The object is moved 3 cm down from from its equilibrium position in the positive direction of movement, then it is released with speed zero initial. Assuming that there is no damping and that the object is under external force equal to: 20cos4(t) (N) a) Formulate the initial value problem that...
A 500 kg elevator accelerates upward at 1.9 m/s2 for 20 m, starting from rest. a)...
A 500 kg elevator accelerates upward at 1.9 m/s2 for 20 m, starting from rest. a) How much work does gravity do on the elevator? b) How much work does the tension in the elevator cable do on the elevator? c) What is the elevator’s kinetic energy after traveling 20 m?
A 67-kg woman in an elevator is accelerating downward at a rate of 1.8 m/s2. What...
A 67-kg woman in an elevator is accelerating downward at a rate of 1.8 m/s2. What is the magnitude of the force exerted by the elevator floor on the woman's feet? A 51-kg woman in an elevator is accelerating downward at a rate of 1.9 m/s2. What is the magnitude of the gravitational force acting upon the woman?
a) Consider a person of 70 Kg. 0.20% of the body mass is potassium and it...
a) Consider a person of 70 Kg. 0.20% of the body mass is potassium and it is a vital nutrient. Natural potassium (mostly 39K and 41K) also contains 0.012% 40K with a half- life time of 1.3 billion years. 40K emits a β- of average energy of 58.5 keV in 89.3% of its decays and a 1.461 MeV γ-ray in 10.7% of the decays. How many of these high-energy γ-rays is generated in the person per second? b) If you...
A person with mass mp = 70 kg stands on a spinning platform disk with a...
A person with mass mp = 70 kg stands on a spinning platform disk with a radius of R = 2.1 m and mass md= 187 kg. The disk is initially spinning at ω = 1.4 rad/s. The person then walks 2/3 of the way toward the center of the disk (ending 0.7 m from the center).   1. What is the total moment of inertia of the system about the center of the disk when the person stands on the...
An object of mass 4.15 kg undergoes an acceleration of 3.5 m/s^2 for a period of...
An object of mass 4.15 kg undergoes an acceleration of 3.5 m/s^2 for a period of 7.0 seconds. It then undergoes an acceleration of -4.2 m/s^2 for a period of 18.0 seconds. If the initial velocity of the object is 4.01 m/s and it first experiences the acceleration when it is at the origin, plot by hand on graph paper (to scale) the force, velocity, and position graphs as functions of time. Explain why your graphs look the way they...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT