The elastic potential energy stored in the spring is <u>0.017J</u>
When a spring is compressed, work is done against the restoring force which is set up in the spring. This work done is stored in the spring as its elastic potential energy.
The expression for elastic potential energy stored in a spring is given by,
Here, <em>k</em> is the spring constant and <em>x </em>is the compression in the spring.
Substitute 0.12 m for <em>x</em> ans 2.3 n?m for k.
Thus the spring stores 0.017 J as its elastic potential energy when compressed by 0.12 m.
Answer:
Explanation:
Initial velocity, u = 85 m/s
Final velocity, v = 45 m/s
Time, t = 4.5 s
We need to find the acceleration of the dragster. The rate at which the velocity of an object changes is called the acceleration of an object. It can be given by :
So, the acceleration of the dragster is and it is deaccelerating.
THE MINI
Alec Issigonis, 1959
The Telephone
Alexander Graham Bell, 1876
http://www.radiotimes.com/news/2013-01-08/the-50-greatest-british-inventions
Due to friction from sliding against the ground, the player decelerates in 1 direction. Thus his momentum decreases.