I am positive with my and answer and i think yes
Answer:
19.53 cm
Explanation:
The computation of the height is as follows:
Here we applied the conservation of the energy formula
As we know that
P.E of the block = P.E of the spring
m g h = ( 1 ÷ 2) k x^2
where
m = 0.15
g = 9.81
k = 420
x = 0.037
So now put the values to the above formula
(0.15) (9.81) (h) = 1 ÷2 × 420 × (0.037)^2
1.4715 (h) = 0.28749
h = 0.19537 m
= 19.53 cm
Answer:
1) The initial velocity equals
2) The velocity with which the keys were caught equals
Explanation:
Let the keys be thrown with a speed 'u' vertically upwards. Since the keys are caught after time 't' while covering a distance 'h' we can use second equation of kinematics to relate these terms.
According to second equation of kinematics the displacement of an object in 't' time is given by
Applying the corresponding values and solving for the initial speed 'u' we get
The change in velocities while covering a distance 's' can be found from first equation of kinematics
Thus we have
Applying corresponding values we get
RADIATION is the transfer of energy as waves moVing through space.
Hope this helps you!
~Autumly