60 50 40 Time 5.7s 30 130 m 20 120 m 10 110 m 2 3 Time (s) 100 m 90 m 80 m 120 70 m 100 60 m 80 50 m 60 40 m 40 30 m 20 m 10 m 2 3 4 Time (s) 1 5 Drop! Reset Select your Gravity: Mars Initial Height = 60 m ] Value for Gravity = 3.711 m/s? E E E Distance (m) Velocity (m/s)

PHYS 2325 HW #5 1) A roller coaster cart is moving across the top of a circular curve (radius = 25 m) as shown below: If the cart moves too fast over this hill, it will be launched into the air! Of course, we do not want this to happen, so what is the maximum speed that the cart can move over the top of the track without losing contact?

We always launch vertically when leaving Earth because   Question 25 options:   it eliminates the need for a long takeoff runway   it minimizes the acceleration experienced by the crew   it's the best way to overcome gravity   it minimizes the atmospheric drag

If a freely falling object were somehow equipped with a speedometer on a planet where the acceleration due to gravity is 20 m/s/s, then its speed reading would increase each second by Group of answer choices 10 m/s. 30 m/s. depends on its initial speed 20 m/s. 40 m/s.

A football is thrown by a quarterback (from shoulder level) to a receiver downfield, who catches it at shoulder level. At what point is the ball's speed at a minimum? (assume air resistance to be negligible). A. (a) just after leaving the quarterback's hand. B. (b) just before arriving at the receiver's hand. C. (c) at the top of the trajectory. D. (d) the speed is constant throughout the entire trajectory.

A ball is tossed in an arc. What can you say about the acceleration of the ball at these three parts of its trajectory: as it ascends, at the top of the arc and as it descends on the other side?

The wrench starts at rests and is accelerating at 2 m/s^2 while you throw it, at a given time you notice it has a velocity of 10 m/s, how long was it accelerating for? 2 seconds O 4 seconds O 5 seconds O 10 seconds O 15 seconds

20. George drops a stone from atop a cliff of height h that overlooks the ocean. (a) Ignoring air resis- tance, show that the stone hits the water in time 2h (b) If the cliff is 25 m high, show that the time of fall is 2.2 s. (c) Show that the stone will hit the water at a speed of 22 m/s.

A ball rolls off the edge of a table and hits the floor below. If the ball’s speed were somewhat greater, the time to hit the floor would be

You are diving board over a swimming pool. You are throwing upward a tennis ball at a speed 3 m/s. On its way back down the tennis ball narrowly misses the diving and hits the water below at 15 m/s. The board is about