Answer:
c. 15.4 s
Explanation:
Given the following data;
Mass, m = 50kg
Force, F = 130N
Initial velocity, u = 20m/s
Final velocity, v = 60m/s
To find the time;
First of all, we would solve for acceleration using the formula below;
Force = mass * acceleration
130 = 50*acceleration
Acceleration = 130/50
Acceleration = 2.6m/s²
Now, we would use the first equation of motion to find the time.
V = U + at
60 = 20 + 2.6t
2.6t = 60 - 20
2.6t = 40
t = 40/2.6
Time, t = 15.39 ≈ 15.4 seconds.
The time taken will be 15.4 seconds approximately. The correct answer is option c
NEWTON SECOND LAW
Newton's second law state that, the rate of change of momentum is proportional to the force applied.
Given that a force of 130 N be applied to an object of mass 50 kg to change its speed from 20 m/s to 60 m/s. The given parameters are;
from Newton's second law,
Ft = m(v - u)
Substitute all the parameters into the formula
130t = 50 (60 - 20)
130t = 50 x 40
130t = 2000
t = 2000/130
t = 15.38 seconds
Therefore, the time taken will be 15.4 seconds approximately. The correct answer is option c
Learn more about Newton's law here: https://brainly.com/question/25545050
