You are standing on the surface of the Sun (wear your sunscreen!). If you want to launch a projectile straight up so that it never returns, at what speed do you need to launch it? MSun=2.00x10^30kg RSun=6.96×10^5km.

5. The engine of lunar lander is shut off when the lander is 5.0 m above the surface of the moon and descending at 2.0 m/s. If the acceleration due to gravity on the moon is 1.6 m/s2, what is the speed of the lander just before it touches the surface? (Hint: Make a diagram. Consider vector directions)

Two planes, A and B, are flying at the same altitude. Their velocities are v₁ = 500 km/h and VB = 670 km/h such that the angle between their straightline courses is = 60°. (Figure 1) B VA - 500 km/h Determine the magnitude of the velocity of plane B with respect to plane A. Express your answer in kilometers per hour to three significant figures. Determine the direction angle of the velocity of plane B with respect to plane A, measured counterclockwise from the positive x axis. Express your answer in degrees to three significant figures.