A bicyclist is traveling at 2.0m/s then gets faster when traveling down a hill, reaching 19 m/s in only 3.5s. a) What was the acceleration of the rider, assuming it was constant for the ride? b) How long was this hill?

a.

b.36.75 m

Explanation:

We are given that

Initial speed, u=2m/s

Final speed, v=19 m/s

Time, t=3.5 s

a.

We know that

Acceleration, a=

Using the formula

Hence, the acceleration of the rider,

b.

We know that

Using the formula

Length of hill=36.75m

emily ruth's annual premium is $1058.50

step-by-step explanation:

emily ruth is a female of 27 years age purchasing 20 year endowment insurance with face value $25000.

from the given table,

for females, the age of a male 3 years younger should be used.

so, we have to check for 24 year male for 20 year endowment.

it is 42.34 for every $1000 face value.

for a face value of $25000,

it is 25 * 42.34 = $1058.50

∴ emily ruth's annual premium is $1058.50

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s