Answer:
- 4.88 m/ s²
Explanation:
Speed of trainer = 550 km/h
= 152.77 m /s
For making apparent weight equal to zero, weight must be equal to centrifugal force or
mg = mv² / R
g = v² / R
v² = gR
= 9.8 x 1200
= 11760
v = 108.44 / m
So velocity has to be reduced from 152.77 to 108.44 m /s
Distance covered during this period
= 2πR / 4 = 2 x3.14 x 1200 / 4
= 1184 m
v² - u² = 2as
108.44² - 152.77² = 2x a x 1184
a = - 4.88 m/ s²
Answer:
the elastic potencial energy stored when the spring is compressed x=8 cm is K(x)= 0.048 J
Explanation:
since the work is related with the force through
W=∫F dx
for a spring of constant k :
F=k*x , where F= compression force, x= compression length
then for a compression from 0 until x
W=∫F dx = ∫ k*x dx = k ∫x dx =1/2*k*x² - 1/2*k*0² = V(x) - V(0)
since the work depends only on the final value of compression and not on the process 1/2*k*x² represents the elastic potential energy V stored in the spring, then
V(0) = 1/2*k*0² = 0
V(x) = 1/2*k*x²
when the spring is compressed x= 8 cm = 0.08m , the elastic potencial energy is
V (x) = 1/2*k*x² = 1/2 * 15 N/m* (0.08m)² = 0.048 J
Answer:
B
Explanation:
a straight yellow is a no pass zone
Answer:
If there wasn't gravity on the earth, everything would float in the atmosphere as in the moon.
Due to the gravity, the rain and snow are pulled down to the earth's surface. So, gravitational force causes rainfall and snowfall
plz mark brainliest
Answer:
I cannot do the laws of physics cuz I hate science but I'm just dance
Explanation:
<u>it's</u><u> it's true</u>
