A spaceship enters the solar system moving toward the Sun at a constant speed relative to the Sun. By its own clock, the time elapsed between the time it crosses the orbit of Jupiter and the time it crosses the orbit of Mars is 50.0 minutes.
How fast is the spaceship traveling towards the Sun? The radius of the orbit of Jupiter is 778 109 m, and that of the orbit of Mars is 228 109 m.
A) 0.522c B) 0.438c C) 0.319c D) 0.982c E) 0.671c
Question 2
A solid uniform sphere is rolling without slipping along a horizontal surface with a speed of 5.5 m/s when it starts up a ramp that makes an angle of 25 with the horizontal.
What is the speed of the sphere after it has rolled 3.0 m up as measured along the surface of the ramp?
A) 4.0 m/s
B) 8.0 m/s
C) 1.9 m/s
D) 2.2 m/s
E) 3.5 m/s