Answer:
F =1490.9 N
Explanation:
given,
work done = 82 J
compression length = 0.220 m
for parallel combination
= 2 k
work done
force =
F = kx
F = 3388.43 ×0.22
F =745.45 N
the additional work done
final potential energy =
= 4 W = 328 J
the additional work = 328 - 82 = 255 J
maximum force
F = k × 2x
F = 2×745.45
F =1490.9 N
Answer:
the rocks have the same amount of thermal energy
Answer;
- 15 J
Explanation;
-Potential energy is defined as mechanical energy, stored energy, or energy caused by its position.
-For the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m /s² at the surface of the earth) and h is the height in meters.
Potential energy of the rabbit at the peak of its height is
PE = (3)(10)(0.5) = 15 J
(around 14.7 but because energy is lost, it is less than that)
Answer:
a)t = 0.323 sec
b)t'= 0.323 sec
c)|h|= 0.52 m
d)y=1.56 m
Explanation:
The speed of ball ,U=104 km/h
U = 104 x 5/18 m/s =28.88 m/s
x= 18.3 m
a)
The half of distance = 18.3/2=9.15 m
We know that
Distance = Velocity x time
9.15 = 28.28 .t
t = 0.323 sec
b)
The total time to cover distance 18.3 m
18.3 = 28.88 x T
T=0.646 m
So the second half distance will cover in t' time
t' = T -t
t' = 0.646 - 0.323
t' = 0.323 s
c)
Initial velocity in y direction is zero.
Vo= 0
h= - 0.52 m ( this is displacement and we know that it is a vector)
So magnitude of |h|= 0.52 m
d)
H= - 2.08 m
|H|= 2.08 m
So the in second half y = H- h
y= 2.08 - 0.52 m
y=1.56 m
Answer:
e. all of these
Explanation:
The fatigue strength is improved by then high alloy steels , high yield steels , high hardened steel , high ultimate steel .
Due to the formation of the improved materials in alloy steels will increase the fatigue strength . Similarly for a high yield steels and hardened steels these cycles to failure will improve .