The concepts necessary to solve this problem are those given by the kinematic equations of motion. We will apply the speed as a unit of distance traveled in a given time.
The total distance of 50 miles is traveled with a speed of 34mph in the time 
and the distance of another 50 miles is traveled with a speed 66mph in the time 
.
Determine the value of as follows.
Where t=time, d=distance, v= Velocity
Determine the value of as
Therefore the total time taken is
The above result is the total time taken to reach the grandmother's house
Now the average velocity is
Therefore the average speed on the way to grandmother's house is 44.87mph
Answer:
That's about 12 kilometers per hour faster than the average female professional tennis player.
Explanation:
Answer:
Explanation:
We are given that
Distance between plates=d=2.2 cm=
Using 
We have to find the magnitude of E in the region between the plates.
We know that the electric field for parallel plates
Where 
Substitute the values
Hence, the magnitude of E in the region between the plates=
Answer:
Explanation:
r(t) = A(cos wt i + sin wt f)
= A cos wt i + A sin wt j
x = A cos wt
y = A sin wt
radius r
r² = x² + y² ( This is equation of a circle with radius r )
= A² cos² wt +A² sin² wt
= A²
r = A
radius r = A
b )
speed = dr/dt
v = - Aw sinwt i + Aw coswt j
magnitude of velocity
I v I= Aw √(sin²wt + cos²wt)
= Aw ( constant )
acceleration
= dv / dt = - Aw² cos wt - Aw² sinwt
magnitude of acceleration
I a I = Aw²
= r w²
d ) centripetal force = m acceleration
m w² A
=
