The work done by the engine is equal to the gravitational potential energy (GPE) put into it. GPE = mgh
GPE = Work = 1200·9.81·13 = 153,036J
Answer:
0.83m/s
Explanation:
Given parameters:
distance = 1000m
time taken = 20min
Unknown:
Speed of the walking person = ?
Solution:
To solve this problem;
Speed =
Time taken should be in seconds;
1 min = 60s
20min = 20 x 60 = 1200s
Speed =
= 0.83m/s
Take 110 and divide it by 2 and there's your answer
3 protons should be your answer
The force = 0.3 * 9.8 = 2.94
x = 0.13
k = 2.94/0.13
k = 22.6 N/m