Tom has built a large slingshot, but it is not working quite right. he thinks he can model the slingshot like an ideal spring with a spring constant of 45.0 n/m. when he pulls the slingshot back 0.235 m from a nonstretched position, it just does not launch its payload as far as he wants. his physics professor "" by telling him to aim for an elastic potential energy of 14.5 j. tom decides he just needs elastic bands with a higher spring constant. by what factor does tom need to increase the spring constant to hit his potential energy goal?

Your answer is 32 hope i  

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.