(kinematics) need asap. give me a step by step explanation
an automobile moves at a constant velocity of 15.0 m/s east for 4.50 minutes. how far does the automobile travel?

-- 4.5 minutes lasts 270 seconds

-- the case covers 15m in each sec

-- its total distance is

(15 m/s) x (270 sec) = 4,050 meters

f is prop to m1xm2 double m1 double force

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27