Question 1

The accompanying gure shows the velocity v = f(t) of a particle moving on a coordinate line. (a) When does the particle move fonNard? move backward? speed up? slow down? (It) When is the particle's acceleration positive? negative? zero? (c) When does the particle move at its greatest speed? (:1) When does the particle stand still for more than an instant? (a) When does the particle move forward? (Type an equation or a compound inequality. Type an expression using t as the variable. When does the particle move backward? (Type an equation or a compound inequality. Type an expression using t as the variable. When does the particle speed up? (Type an equation or a compound inequality. Type an expression using t as the variable. When does the particle slow down? (Type an equation or a compound inequality. Type an expression using t as the variable. (b) When is the particle's acceleration positive? (Type an equation or a compound inequality. Type an expression using t as the variable. When is the particle's acceleration negative? (Type an equation or a compound inequality. Type an expression using t as the variable. When is the particle's acceleration zero? (Type an equation or a compound inequality. Type an expression using t as the variable. (6) When does the particle move at its greatest speed? (Type an equation or a compound inequality. Type an expression using t as the variable. (:1) When does the particle stand still for more than an instant? (Type an equation or a compound inequality. Type an expression using t as the variable. Use a comma to separate answers as needed.) Use a comma to separate answers as needed.) Use a comma to separate answers as needed.) Use a comma to separate answers as needed.) Use a comma to separate answers as needed.) Use a comma to separate answers as needed.) Use a comma to separate answers as needed.) Use a comma to separate answers as needed.) Use a comma to separate answers as needed.) When a model rocket is launched, the propellant burns for a few seconds, accelerating the rocket upward. After burnout, the rocket coasts upward for a while and then begins to fall. A small explosive charge pops out a parachute shortly after the rocket starts down. The parachute slows the rocket to keep it from breaking when it lands. The gure here shows the velocity data from the ight of the model rocket. Use the data to complete 2 parts (a) WONG\" (a). 150 velocity (it/sec) g a 10 12 Time aer launch (sec) (a) How test was the rocket climbing when the engine stopped? ftlsec (Round to the nearest integer as needed.) (b) For how many seconds did the engine bum? sec (Type an integer or a decimal. Round to one decimal place as needed.) (c) When did the rocket reach its highest point? sec (Type an integer or a decimal. Round to one decimal place as needed.) What was the rocket's velocity when it reached to its highest point? ftlsec (Round to the nearest integer as needed.) (d) When did the parachute pop out? sec (Type an integer or a decimal. Round to one decimal place as needed.) How fast was the rocket falling when the parachute popped out? ftlsec (Round to the nearest integer as needed.) (e) How long did the rocket fall before the parachute opened? sec (Type an integer or a decimal. Round to one decimal place as needed.) (0 When was the rocket's acceleration the greatest? The greatest acceleration happened sec aer launch. (Type an Integer or a decimal. Round to one decimal place as needed.) (9) When was the acceleration constant? Acceleration was constant between and sec. (Type integers or decimals, Round to one decimal place as needed.) What was the acceleration then? memo