A ball rolls from x = 10 m to
x= -25 m in 2.5 seconds. What was
its average velocity?
(Units = m/s)
Don't forget: velocities and displacements to
the right are +, to the left are -

the answer is 3.1 his answer is wrong mines is right

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

1.195000

explanation:

total mass=0.0117+0.0137+0.0881+0.0111

total mass= 0.01172kg

total velocity = 0.283-0.743+0.871-0.799+0.155+0.637+0.301=0.102

momentum=mv=0.1172*0.102=1.195000//