Answer: They have different rigidities.
Explanation:
Answer:
A. The forces are the same size and in opposite directions.
Explanation:
Just as an opposite number will cancel a number: -1 +1 = 0, so an opposite force will cancel a force, with the result that the net is zero.
Answer:
Explanation:
The stored elastic energy in the spring helps the box to rise to a height of .75 m
So stored elastic energy = potential energy attained
1/2 k d² = mgh , k is spring constant , d is compression in spring , m is mass of box , h is height attained .
Putting the values
.5 x 220 x d² = 4 x 9.8 x .75
d² = .2673
d = .517 m
51.7 cm .
Answer:
A) How much work does the Pepsi do on the bullet = 0.0625J
B) At what velocity does the Pepsi hit the floor = 7.67m/s
Explanation:
- Given mass of bullet = 5g
- initial velocity = 500 m/sec
From work done = Force X Distance
Workdone ; m(v - u )/t
A) The work done by the Pepsi is equal to the change in kinetic energy while in the Pepsi:
- but The work done by the container wall on the bullet is equal to the change in kinetic energy on either side of the wall: W = change in kinetic energy = 1/2 mv²
= 1/2 X 0.005 x 500² - 1/2 X 0.055 x 5²
= 624.94J
- Therefore ; The work done by the Pepsi is equal to the change in kinetic energy while in the Pepsi = W = change in KE = 0.0625 - 0 = 0.0625J
B) At what velocity does the Pepsi hit the floor?
- From conservation of energy principle; PE = KE
Calculate the kinetic energy of an 86-kg scooter moving at 18 m/s?
K.E. = (1/2)mv^2
K.E. = (1/2)86 * 18^2
K.E. = (Answer Unit) =====> J
M = 86kg
V = 18 m/s
Significant Figures ======> 6
Answer: ======>
KE = 13932 J
Show work:
1/2 * 86 * 18^2
(1/2)86 * 18^2
Remove Parenthesis:
a = a
1/2 * 86 * 18^2
Multiply Fractions:
a * b/c = a * b/c
= 1 * 86 * 18^2/2
Multiply the numbers:
1 * 86 = 86
18^2 * 86/2
Divide the numbers:
86/2 = 43
18^2 * 43
18^2 = 324
43 * 324
Multiply the numbers:
43 * 324
13932
Therefore, Your answer is KE = 13932 J
Hope that helps!!!! : ) sorry for the long explanation!!!
