A parachutist whose mass is 85 kg drops from a helicopter hovering2000 m above the ground and falls toward the ground under theinfluence of gravity. Assume that the force due to air resistance isproportional to the velocity of the parachutist, with the proportionalityconstant b 1 = 20 N - sec/m when the chute is closed and b 2 = 90 N- sec/m when the chute is open. If the chute does not open until thevelocity of the parachutist reaches 35 m/sec, after how many secondswill the parachutist reach the ground? Assume that the acceleration dueto gravity is 9.81 m/ sec ^2

The objective of the question is to find out the total time taken by the parachutist to reach the…

Answered: A parachutist whose mass is 85 kg drops…

Similar questions

In the figure, a crate of mass m = 77 kg is pushed at a constant speed up a frictionless ramp (0 = 25°) by a horizontal force. The positive direction of an x axis is up the ramp, and the positive direction of a y axis is perpendicular to the ramp. (a) What is the magnitude of F? (b) What is the magnitude of the normal force on the crate? (a) Number i (b) Number i Units Units ‒‒‒‒‒
A block of mass m = 0.5 kg is kicked so that it slides up a ramp inclined at an angle θ = 30°. At the bottom of the ramp, the block has speed v0 = 4.0 m/s. There is a coefficient of kinetic friction between the block and ramp µk = 0.18. (a) How far up the ramp does the block slide? (b) Assume that the block comes to rest and does not slide back down the ramp. What must be the minimum coefficient of static friction between the block and ramp?
A parachute has the same mass when it is in a pack and when it is spread out, but when the parachute is out the person wearing falls more slowly. How does this connect to the formula ∑F = ma?
An electron is a subatomic particle (m= 9.11 x 10-31 kg) that is subject to electric forces. An electron moving in the +x direction accelerates from an initial velocity of +7.31 x 105 m/s to a final velocity of 1.98 x 106 m/s while traveling a distance of 0.0545 m. The electron's acceleration is due to two electric forces parallel to the x axis: F₁ = 7.52 x 10-¹7 N, and F2, which points in the -x direction. Find the magnitudes of (a) the net force acting on the electron and (b) the electric force F2. F₁ F₁ F₂ F₁ (a) Number i (b) Number i VO X Units Units
A constant horizontal force pushes a 7.50 kg FedEx package across a frictionless floor on which an xy coordinate system has been drawn. The figure gives the package's x and y velocity components versus time t. What are the (a) magnitude and (b) direction of F? Give the direction as a positive or negative angle of magnitude less than 180° relative to the +x-axis. Vy (m/s) v (m/s) x 10 5 (a) Number (b) Number 1 a 2 Units Units t (s) 3 0 -5 -10 IL 0 ◄► 3 t(s)
An antelope is being pulled by two forces whose vector-component expressions are: F1 = -3.5Ni + 3.4Nj + 3.9Nk F2 = 3Ni + 2.6Nj + -1.5Nk What is the angle (in degrees) between these two vectors?
A box of mass 10.2 kg is slid along the floor. The initial speed of the box is 2.5 m/s and it comes to rest after 8.1 m. What was the magnitude of the force of friction acting on the box during this motion? You must enter you answer and include the SI units. (For example: 3.0kg)
A toy car of mass m is on a level table that is a height h above level ground. While on the table, a toy moves in a straight line and has an acceleration given by a = Bt. It starts from rest at t = 0 and travels a distance L before reaching the edge of the table. Once it reaches the edge of the table, it falls towards the ground under the effect of gravity alone. Neglect the air resistance and take the magnitude of the acceleration due to gravity to be g. Your answer is only allowed to have B, L, g, and/or h. (a) Say you are to determine the velocity with which it strikes the ground. In words and equations, clearly explain your plan for how you would solve this problem. (b) Now determine the velocity with which it strives the ground. Express the velocity in component form. (c) At what angle does it strike the ground?
A car with a mass of 1.3x10° kg is skidding to a stop along a horizontal surface. The car decelerates from 33 m/s to rest in 3.9 seconds. Assuming negligible air resistance, determine the coefficient of friction between the car tires and the road surface.
A golf ball (m = 67.8 g) is hit by a clab that makes an angle of 25.1° with the horizontal. The ball lands 222 m away on a flat fairway. The acceleration of gravity is 9.8 m/s2. If the golf club and ball are in contact for 3.34 ms, what is the average force of impact? Neglect air resistance. Answer in units of N.
Imagine a skydiver with a mass of m jumping out of an airplane at an altitude of h. As the skydiver descends, they experience two forces: air resistance and gravity. The force of air resistance varies with time and is described by the following function, where t is the time in seconds since t e skydiver has jumped: vec 2 (F)(t) = (0.5t)ha (x) + (0.11 +0.3t)hat(y) a) Create a air free body diagrar for the skydiver at t = 2 seconds. b) - What is the net for e acting on the skydiver at t = 2 seconds? c) What i the magnitude of the acceleration of the skydiver at t = 2 seconds? Imagine a skydiver with a mass of m jumping out of an airplane at an altitude of h. As the skydiver descends, they experience two forces: air resistance and gravity. The force of air resistance varies with time and is described by the following function, where t is the time in seconds since the skydiver has jumped: Fair (t) = (0.5t)2 + (0.12 + 0.3t)ŷ a) Create a free-body diagram for the skydiver at t = 2 seconds.…
A block with mass m = 14.9 kg slides down an inclined plane of slope angle 18.8o with a constant velocity. It is then projected up the same plane with an initial speed 2.95 m/s. How far up the incline will the block move before coming to rest?

SEE MORE QUESTIONS