Full Question
A 10 kilogram object suspended from the end of a vertically hanging spring stretches the spring 9.8 centimeters. At time t = 0, the resulting mass—spring system is disturbed from its rest state by the force F (t) = 20 cos(8t). The force F (t) is expressed in Newtons and is positive in the downward direction, and time is measured in seconds.
Determine the spring constant k.
Answer:
Spring Constant = 1000Nm^-1
Step-by-step explanation:
Given
Mass = 10kg
Spring Extension = 9.8cm
Spring Constant K = Force/Extension
Force = Mass * Acceleration
Force = 10 * 9.8 = 9.8N
Spring Extension = 9.8 cm = 9.8 /100 = 0.098 m
Spring constant = 98 / 0.098
Spring Constant = 1000Nm^-1
Answer:
Height = 8 units
Step-by-step explanation:
Area of a triangle =
square units
=
square units
Height of the triangle =
units
=
units
Formula to calculate the area of a triangle is,
Area = 


Height = 
= 
= 8 units
Therefore, height of the given triangle is 8 units.
Answer:
900 yards
Step-by-step explanation:
540/3=180
180x5=900
Answer:
Option A. is the right choice.
Step-by-step explanation:

Best Regards!
Answer:
He needs to get 96%
Step-by-step explanation:
Add 96 89 77 and 78 together and divide by 4, it should be 85