7/24/2019 Linear Motion Problems

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Linear Motion Problems

1. A person jumps from a fourth-story window 15.0 m above a firefighters safety net. The

survivor stretches the net 1.0 m before coming to rest. (a !hat was the average

dece"eration e#perienced by the survivor when s"owed to rest by the net$ (b !hat

wou"d you do to ma%e it &safer' (that is generate a sma""er dece"eration) wou"d youstiffen or "oosen the net$ *#p"ain.

+. The acce"eration due to gravity on the ,oon is about one si#th what it is on *arth. f an

object is thrown vertica""y upward on the ,oon how many times higher wi"" it go than it

wou"d on *arth assuming the same initia" ve"ocity$

. A race car driver must average +00.0 %m/h over the course of a time tria" "asting ten "aps.

f the first nine "aps were done at 1.0 %m/h what average speed must be maintained for

the "ast "ap$

. A po"ice car at rest passed by a speeder trave"ing at a constant 110 %m/h ta%es off in hot

pursuit. The po"ice officer catches up to the speeder in 200 m maintaining a constantacce"eration. (a 3a"cu"ate how "ong it too% the po"ice officer to overta%e the speeder (b

ca"cu"ate the re4uired po"ice car acce"eration and (c ca"cu"ate the speed of the po"ice car

at the overta%ing point.

Linear Motion Problems

1. erson jumps from a fourth-story window 15.0 m above a firefighters safety net. The

survivor stretches the net 1.0 m before coming to rest. (a !hat was the average

dece"eration e#perienced by the survivor when s"owed to rest by the net$ (b !hat

wou"d you do to ma%e it &safer' (that is generate a sma""er dece"eration) wou"d you

stiffen or "oosen the net$ *#p"ain.

+. The acce"eration due to gravity on the ,oon is about one si#th what it is on *arth. f an

object is thrown vertica""y upward on the ,oon how many times higher wi"" it go than it

wou"d on *arth assuming the same initia" ve"ocity$

. A race car driver must average +00.0 %m/h over the course of a time tria" "asting ten "aps.f the first nine "aps were done at 1.0 %m/h what average speed must be maintained for

the "ast "ap$

. A po"ice car at rest passed by a speeder trave"ing at a constant 110 %m/h ta%es off in hot

pursuit. The po"ice officer catches up to the speeder in 200 m maintaining a constant

acce"eration. (a 3a"cu"ate how "ong it too% the po"ice officer to overta%e the speeder (b

ca"cu"ate the re4uired po"ice car acce"eration and (c ca"cu"ate the speed of the po"ice car

at the overta%ing point.