Download Solved Problems on Average Speed of Accelerations - Assignment | PHYS 117 and more Assignments Physics in PDF only on Docsity! E: . "' @Assume that an airplane accelerates from 550 mph to~ 555 mph, a car accelerates from 60 mph to 67 mph, and a bicycle accelerates from 0 to 10 mph. If all three vehicles accomplish th~se changes in the same length of time, which one (if any) has the largest acceleration? .Byou throw a-~:;-straight l~P in the air. The instant after leaving your hand the ball's speed is 30 meters per second. Ignoring the effects of air resistance, predict how fast the ball will be traveling 2 seconds later. ::4i)A Pin~-P~ng ban a~d a golf ball have approximately the same sIze but very dlfferen tmasses. Which hits the ground first if you drop them simultaneoysly from a tall building? , Do not neglect the effects of air resistance. , --- /5":\ In 1989 Ann Trason broke the U.S. women's record for a V 24-h run by covering a di~nce of 143 miles. What was her averages~eed? - r;t:.\ Starting at 9 A.M., you hike for 3 h at an average speed of V 4 mph. You stop for lunch fro:m noon until 2 P.M. What is your average speed over the interval from 9 A.M. to 2 P.M ~ r;;-) You are trying to decide whet~er to jump o~I a ciitl. into ~e VI water below, but'you cannot judge the heIght .or the cliff. You drop a pebble and note that it takes 2 s to hit the water. How high is the cliff? ..shove so that it moves across a table- r'i)Ifyou gIve thlS book a to p How can you reconcIleL:;;' to it slows and comes to a s . th~ observation with Newton's first law? @ tasse l han gin g from the rearview mirror appear7 Why does a , .to swing forwa~ou apply the b~ ~ind the size of the net force produced by a 6-N and an, ~-N force in each of th following arrangements: a. The forces act in the same direction. b. The forces act in opposite directions. c. The forces act at right angles to each other. 60 OOO-kg railroad boxcar is R, The net horizontal force on ~ ' boxcar? V 6000 N. What is the acceleratIon of the ~
