Answer:
38.8 m
Explanation:
h = -(21 + 1.75) = - 22.75 m
g = - 9.8 m /s^2
Ux = 14.004 m/s
Uy = + 5.376 m/s
Let the ball hits the ground in time t and at a distance d from the base of hill.
Use second equation of motion
h = Uyt + 0.5 at^2
- 22.75 = 5.376 t - 0.5 x 9.8 t^2
4.9 t^2 - 5.376 t - 22.75 = 0
By solving
t = 2.77 second
So, horizontal distance
d = Ux t
d = 14.004 x 2.77 = 38.8 m
Answer:
Velocity of electron will be
Explanation:
We have given distance across the plate d = 2 mm
Potential difference V = 6 volt
We know that potential difference at any distance is given by
V = Ed , here V is potential difference, E is electric field and d is distance
So
Charge on electron
We know that expression of velocity is given by , here q is charge on electron, E is electric field and d is distance
So
Answer:
5.05 m
Explanation:
length of stick (L) = 1 m
distance from the top of the stick to the ground (d) = 2.07 m
time taken for corn to travel the length of the stick (t) = 0.121 s
acceleration due to gravity (a) = 9.8 m/s^{2}
we can get the distance in four stages.
where s = length of stick, t = time, a = acceleration due to gravity
1 = 0.121u + (0.5 x 9.8 x 0.121 x 0.121)
1 = 0.121v + 0.0717
1 - 0.0717 = 0.121v
v = 7.67 m/s
v = final velocity = 7.67 m/s
u = initial velocity = 0 m/s since it was initially at rest
a = acceleration due to gravity
t' = time taken to fall to the top of the stick
7.67 = 0 + (9.8 x t')
t' = 7.67 / 9.8 = 0.78 s
s = distance
v = initial velocity = 0 m/s since it was initially at rest
t = time = 0.78 s
a = acceleration due to gravity = 9.8
s = 0 + (0.5 x 9.8 x 0.78 x 0.78)
s = 2.98 m
2.98 + 2.07 = 5.05 m