A car heading north suddenly collides at an intersection with a truck of the same mass heading east. If they lock together and travel at at 15 north of east just after the collision, how fast was the car initially traveling?
A) 14 m/s
B) 7 m/s
C) 28 m/s
D) 11 m/s
Question 2
The earth has radius R. A satellite of mass 100 kg is in orbit at an altitude of 3R above the earth's surface. What is the satellite's weight at the altitude of its orbit?
A) 61 N
B) 110 N
C) 9000 N
D) 16,000 N