Abox rests on the (frictionless) bed of a truck. the truck

driver starts the truck and accelerates forward. the box!

immediately starts to slide toward the rear of the truck

bed. discuss the motion of the box, in terms of newton's

laws, as seen (a) by mary standing on the ground beside

the truck, and (b) by chris who is riding on the truck

(fig. 4–35).

Wavelength = pie*69+69 with ur mom

Ithink it’s: light bounce if off a mirror

Distance covered = speed x timethe distance traveled going against the stream = distance traveled with the stream.therefore it is the speed and the time that are the variables.as he travels the same distance both ways, speed x time is the same for each way.going upstream his speed is 4 kph; going downstream his speed is 6 kph.therefore we have two simultaneous equations: time upstream x 4 = time downstream x 6time upstream + time downstream = 60 minutestherefore we have the equation: time upstream = 6/10 hour, time downstream therefore = 4/10 hour.distance traveled at 4km/hr in 6/10 hour = 24/10 = 2.4km.check: distance traveled at 6km/hr in 4/10 hour = 24/10 = 2.4km.