3. Three friends run a race. The graph below describes their motion. a. Who runs at the slowest speed?

b. Who passes Aiesha first?

c. Who travels the farthest after 5 seconds?

d. Estimate the velocity of Cecilia (show your work)

e. Estimate the velocity of Michelle (show your work)

f. Write an equation for the position of Alesha.

8. What is the acceleration of Michelle?

Aforce of 34n stretches a very light ideal spring 0.73 m from equilibrium, what is the force constant (spring constant) of the spring? (a) 47n/m (b) 38n/m (c) 53n/m (d) 25n/m

Gunpowder residue is most likely to show up where on a shooters hands

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.