A load of 65 N attached to a spring hanging vertically stretches the spring 7.7 cm. The
spring is now placed horizontally on a table
and stretched 13 cm.
What force is required to stretch it by this
amount?
Answer in units of N.

Velocity is the speed of an object in a certain direction so you'd need to know speed and direction

Iwould have to say sorry i can't elaborate more. hope this though!

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.