That's the right speed, although mass times gravity has nothing to do with it.SCA said:I got it by doing mass times gravity, The initial speed is 15.29 m/s
You need to calculate the deceleration first.SCA said:Yeah sorry I was answering your question about how I got the first number. Not really, is the deceleration the force of air resistance?
You got the right answer but I'm not sure you know exactly why. You can go ahead and calculate the forces now. But you ought to justify that deceleration value.SCA said:No never mind 3.29 would be the acceleration you use to calculate the net force?
No. That's less than the force due to gravity. Draw a diagram of the forces and you should see what is happening.SCA said:is the end answer 404.86?
Air resistance, also known as drag, is a force that opposes the motion of an object through the air. As the parachutist falls at 55km/h, they will experience an increasing amount of air resistance due to their increasing velocity. This means that the force of air resistance will slow down the parachutist, reducing their speed.
The force of air resistance on a parachutist can be influenced by several factors, including the surface area of the parachutist, the shape and design of the parachute, the density of the air, and the speed at which the parachutist is falling.
The force of air resistance can be calculated using the formula F = 0.5 * ρ * v^2 * A * Cd, where F is the force of air resistance, ρ is the density of the air, v is the velocity of the parachutist, A is the surface area of the parachutist, and Cd is the drag coefficient, which is determined by the shape and design of the parachute.
No, the force of air resistance is not constant for a parachutist falling at 55km/h. As the parachutist falls, their velocity and the force of air resistance will change. Initially, the force of air resistance will be low, but as the parachutist gains speed, the force of air resistance will increase, eventually reaching a point of equilibrium where the force of air resistance is equal to the force of gravity, resulting in a constant falling speed known as terminal velocity.
The force of air resistance can be minimized for a parachutist falling at 55km/h by using a parachute with a smaller surface area and a more aerodynamic design. This will reduce the drag coefficient and decrease the force of air resistance. Additionally, the parachutist can maneuver their body to reduce their surface area and decrease the force of air resistance.