Answer:
Mass, m = 6 kg
Explanation:
Given that,
The momentum of the object, p = 18 kg-m/s
Velocity, v = 3 m/s
We need to find the mass of an object.
The momentum of an object is given by :
p = mv
m is mass of the object
![m=\dfrac{p}{v}\\\\m=\dfrac{18\ kg-m/s}{3\ m/s}\\\\m=6\ kg](https://tex.z-dn.net/?f=m%3D%5Cdfrac%7Bp%7D%7Bv%7D%5C%5C%5C%5Cm%3D%5Cdfrac%7B18%5C%20kg-m%2Fs%7D%7B3%5C%20m%2Fs%7D%5C%5C%5C%5Cm%3D6%5C%20kg)
So, the mass of the object is 6 kg.
Answer:
2.1J
Explanation:
Given parameters:
Spring constant = 128N/m
Compression = 0.18m
Unknown:
Potential energy of the spring = ?
Solution
The potential energy of the spring is the elastic potential energy within the spring.
To solve this;
Elastic potential energy =
k e²
k is the spring constant
e is the compression
Now;
Elastic potential energy =
x 128 x 0.18² = 2.1J
I reckon it would be centimetres (cm).