The clock is pulling the force towards earth's center because of gravity.
That force is equal to:
F = m*g where g is gravitational acceleration.
We will take that g = 9.81m/s^2
Now:
F = 0.25 * 9.81 = 2.4525 N
The string needs to sustain that force, therefore minimum Force that string has to be able to sustain is:
2.4525 N
Answer:
0.14 J
Explanation:
The maximum velocity is the amplitude times the angular frequency.
vmax = Aω
ω = vmax / A
ω = (3.2 m/s) / (0.06 m)
ω = 53.3 rad/s
For a spring-mass system:
ω = √(k / m)
ω² = k / m
k = ω²m
k = (53.3 rad/s)² (0.050 kg)
k = 142 N/m
The elastic potential energy is:
EE = ½ kx²
EE = ½ (142 N/m) (0.044 m)²
EE = 0.14 J
Answer:
it change speed
Explanation:
its because when light passes through one medium to another (rarer to denser)its velocity change and its speed also changes
Answer: 780080
Explanation: BY FORMULA OF K.E
K.E= 1/2 MV^2
= 1/2 (1990)(28)^2
= 780080 JOULE
