Question

1, A runner of mass 60kg accelerates that 2.0m/s² at the start 0f a race calculate the force provided from her legs
2, two forces are acting on an aircraft of mass 2000kg as shown in figure 3.96

Answer 1

calculate the acceleration of the aircraft

1. The force provided from the runner's legs is equal to her mass multiplied by her acceleration, or 120 N.

2. The acceleration of the aircraft can be calculated using Newton's Second Law of Motion, which states that the net force acting on an object is equal to its mass multiplied by its acceleration. In this case, the net force is equal to the sum of the two forces, or 4500 N. Therefore, the acceleration of the aircraft is 4500 N / 2000 kg = 2.25 m/s².