I believe it’s power, but i could be wrong!
Answer:
91.5 m/s
Explanation:
m = mass of clay = 12 g = 0.012 kg
M = mass of wooden block = 100 g = 0.1 kg
d = distance traveled by the combination before coming to rest = 7.5 m
μ = Coefficient of friction = 0.65
V = speed of the combination of clay and lock just after collision
V' = final speed of the combination after coming to rest = 0 m/s
acceleration caused due to friction is given as
a = - μ g
a = - (0.65) (9.8)
a = - 6.37 m/s²
Using the kinematics equation
V'² = V² + 2 a d
0² = V² + 2(- 6.37) (7.5)
V = 9.8 m/s²
v = speed of clay just before collision
Using conservation of momentum
m v = (m + M) V
(0.012) v = (0.012 + 0.100) (9.8)
v = 91.5 m/s
Each electron winds up with kinetic energy of
(270 keV)
plus
(whatever KE it had when it started accelerating).
<span>C. the universe started with an explosion and expansion of a very hot, dense, compact fireball
</span>
as long as the object is accelerating, all you have to do is to multiply the average velocity by 2 to get<span> the velocity.
To </span>find<span> the </span>acceleration<span>, you take velocity and divide it by the </span>time<span>. if it is traveling uniformly</span>