Astudent weighing 613 n climbs at constant speed to the top of an 7 m vertical rope in 10 s.
what is the average power expended by the student to overcome gravity? answer in units of w.

429.1 W

Explanation:

given,

Weight of the student,F = 613 N

distance,s = 7 m

time,t = 10 s

Average power = ?

Work done is equal to force into distance

W = F.s

W = 613 x 7

W = 4291 J

Average power =

                          =

                          = 429.1 W

The average Power extended by the student to over come gravity is equal to 429.1 W.

the speed of the cart after 3 seconds of low fan speed is ⇒ 54.0 cm/s.

the speed of the cart after 5 seconds of medium fan speed is ⇒ 120.0 cm/s.

the speed of the cart after 2 seconds of high fan speed is ⇒ 64.0 cm/s. 

just did the lab.