Learning Goal If An External Force F Acts On A Rigid Body The Work Uf Done By The Force When It Moves Along A Pat 1 (269.38 KiB) Viewed 41 times
Learning Goal If An External Force F Acts On A Rigid Body The Work Uf Done By The Force When It Moves Along A Pat 2 (158.31 KiB) Viewed 41 times
Learning Goal: If an external force, F, acts on a rigid body, the work, UF, done by the force when it moves along a path s is defined asF=∫rF⋅dr=∫SFcosθds where θ is the angle between the force and the object's direction of motion and r is the position vector that points to the object as it moves along path s. Figure <2 of 2
When a satellite is launched, its orbital radius is usually determined far in advance because the amount of energy required to change its orbit is large. How much work, W, would a rocket thruster on a satellite of mass m=780 kg need to do to change the satellite's orbital radius from r1=2.56×107m to r2=4.31×107m. m (Figure 2 ) The Earth's radius is RE=6.37×106 m. Assume that both orbits are circular. Express your answer numerically in joules to three significant figures.
Join a community of subject matter experts. Register for FREE to view solutions, replies, and use search function. Request answer by replying!