The Speed Of A Bobsled Is Increasing Because It Has An Accel

The Speed Of A Bobsled Is Increasing Because It Has An Acceleration O The speed of a bobsled is increasing, because it has an acceleration of 2.59 m/s². At a specific instant, the forces resisting its motion, including kinetic friction and air resistance, total 481 N. The combined mass of the bobsled and its riders is 316 kg.

Determine the magnitude of the force propelling the bobsled forward and the magnitude of the net force acting on it.

Paper For Above instruction The problem involves analyzing the forces acting on a bobsled to determine both the propelling force and the net force. Given the acceleration, the total resistive forces, and the mass, appropriate application of Newton’s second law enables us to find these forces systematically.

Understanding the problem The bobsled accelerates at a rate of 2.59 m/s², which indicates a net force is acting on it in the direction of motion. The resistive forces, including kinetic friction and air resistance, total 481 N at that same instant.

The total system mass of the bobsled and riders is 316 kg. Our goal is to find: (a) the forward or propelling force exerted on the bobsled, and (b) the net force causing the acceleration.

Key concepts and formulas According to Newton’s second law, F net =m*a , where F net is the net force, m is the mass, and a is the acceleration.

The total propelling force (F

prop ) must overcome resistive forces and produce the observed acceleration. Thus, the forces relate as: F prop -F resistive =F net .

Calculations (a) Magnitude of the propelling force First, compute the net force required to accelerate the bobsled: F net = m * a = 316 kg * 2.59 m/s² = 818.44 N. This net force is the resultant of the propelling force and the resistive forces. Since the resistive forces total 481 N, the propelling force must be greater than the resistive forces by the amount of net force: F prop =F net +F resistive

= 818.44 N + 481 N = 1,299.44 N. Therefore, the magnitude of the force propelling the bobsled forward is approximately 1,299.44 N . (b) Magnitude of the net force As calculated previously: F net = 316 kg * 2.59 m/s² = 818.44 N. The net force acting on the bobsled, which causes the acceleration, is approximately 818.44 N .

Conclusion To summarize, the propelling force that pushes the bobsled forward must be roughly 1,299.44 N to overcome resistive forces and achieve the mentioned acceleration. Meanwhile, the net force responsible for accelerating the bobsled is about 818.44 N, aligned with Newton's second law.

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