Answer:
speed
Explanation:
Given: an incomplete sentence
To fill: the blank
Solution:
Speed is not a vector quantity but a scalar quantity as it has magnitude but no direction.
Speed = Distance ÷ Time
You can calculate an <u>average</u> speed if you know both the total distance and the total time of the trip.
Average speed = Total distance ÷ Total time
Ohms law is V = IR
from this we can rearrange so that I or current is the subject
I = V/R
so if both V and R are doubled, we can represent it as such
I = 2V/2R
The 2s will cancel out hence they effect on the current is nil
Answer:
(A) The acceleration of Melissa is 0.211 m/s²
(B) The net force on Melissa is 9.5 N
Explanation:
Given;
radius of the carousel, r = 8.0 m
speed of Melissa, v = 1.3 m/s
mass of Melissa, m = 45 kg
(A) The acceleration of Melissa is given by centripetal acceleration;
(B) The net Force on Melissa is given by centripetal force;
Answer:
4.9 kg.m/s.
Explanation:
Given that
mass ,m = 0.7 kg
Initial speed , u = 5 m/s ( Towards + x direction)
Final speed ,v= -2 m/s ( Towards - x direction)
We know that linear momentum is given as
P = Mass x velocity
Change in the linear momentum ΔP will be
ΔP = m ( v - u)
Now by putting the values in the above equation ,we get'
ΔP= 0.7 ( -2 - 5 ) kg.m/s
ΔP= - 4.9 kg.m/s
The magnitude of the change in the linear momentum will be 4.9 kg.m/s.