I Motion Problems of each situation described below. That is. 6 Solving One-Dim
ID: 1880466 • Letter: I
Question
I Motion Problems of each situation described below. That is. 6 Solving One-Dim . Draw apictonial sketch, and (ii) deti One-Dimensional Motion Problenm representation of each situation described below c apropriate ponymbols for the known and unknown quantities, u (G) sketch the in the motion, () establish a coordinate showing appropriate points in the motion, (ii) establish on salve. See textbook Figure 2.31 as an example. A car traveling at car's acceleration while braking? you screeches to a halt, leaving 55-m-long skid m marks. What was the h A bicyclist starts from rest and accelerates at 4.0 m/s2 for 3.0 s. The cve 20 s at a constant speed. How far does the cyclist travel? You are driving your car at 12 m/s when a deer jumps in front of your car. What is the shoes soping dstance for your car if your reaction time is 0.80 s and your car brakes at 60 mSExplanation / Answer
a)
From
V2=Vo2+2ad
when the car comes to stop V=0 ,acceleration is negative since car is decelerating
0=302-2*a*55
a=900/110 =8.18 m/s2
b)
From
X=Xo+Vot +(1/2)at2
Distance travelled while accelerating
X1=0 +0+(1/2)*4*32 =18 m
Speed at t=3 s
V=Vo+at
V=0+4*3=12 m/s
Distance travelled at constant speed
X=Vt =12*20 =240 m
Total distance travelled
D=240+18 =258 m
c)
From
X=Xo+Vot+(1/2)at2
X=0+12*0.8 +(1/2)*(-6)*0.82
X=7.68 m
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