Answer: 57.85m above the water
Explanation:
The height is 110m
the initial lenght of the cord is 35m
the spring constant is 44N/m
your mass is 77kg, so your weight is W = 77kg*9.8m/s^2 = 754.6N
So the force that the spring needs to do to cancelate this weight, is
x*44N/m = 756.6N
x = (756.6/44)m = 17.15m
So, at this point, the total elongation of the spring is:
35m + 17.15m = 52.15m
then the distance to the water is:
d = 110m - 52.15m = 57.85m
Answer:
a)
b)
Explanation:
a)
Using the conservation of energy between the moment when the bullet hit the block and the maximum compression of the spring.
Where:
- M is the bullet-block mass (0.00535 kg + 2.174 kg = 2.17935 kg)
- V is the speed of the system
- k is the spring constant (6.17*10² N/m)
- Δx is the compression of the spring (0.0634 m)
Then, let's find the initial speed of the bullet-block system.
b)
Using the conservation of momentum we can find the velocity of the bullet.
I hope it helps you!
Explanation:
Given parameters:
Force = 500N
Acceleration =
Unknown:
Weight can be used to this problem = ?
Solution:
Weight is the vertical force on a body;
Weight = mass x acceleration
So from this we can find the mass and then convert to the second wealth.
When the surface of the comb rubs on your hair, the comb is electrically charged. When the comb comes close to the paper, the charge on the comb causes charge separation on the paper bits. Since paper is neutral, positive and negative charges are equivalent. The charge on the comb charges the area of the bit of paper nearest the comb to the opposite. Thus, the bits of paper become attracted to the comb.
I believe the correct answer would be "A" energy source.