Larry and balky set up an experiment to analyze the motion of a marble as it rolled down an incline. they started the marble at the top of the ramp and set up photogates to collect data as the marble rolled down the ramp. which graph format would allow larry and balky to calculate instantaneous velocity using slope? a) velocity on the y-axis, time on the x-axis b) distance on the y-axis, time on the x-axis c) time on the y-axis, distance on the x-axis d) velocity on the y-axis, distance on the x-axis

After the near spacecraft passed mathilde, on several occasions rocket propellant was expelled to adjust the spacecraft's momentum in order to follow a path that would approach the asteroid eros, the final destination for the mission. after getting close to eros, further small adjustments made the momentum just right to give a circular orbit of radius 45 km (45 × 10^3 m) around the asteroid. so much propellant had been used that the final mass of the spacecraft while in circular orbit around eros was only 545 kg. the spacecraft took 1.04 days to make one complete circular orbit around eros. calculate what the mass of eros must be.

Abearing is designed to a reduce friction b. support a load c. guide moving parts such as wheels, shafts and pivots d. all of the above

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?