1134000J
Use the formula for kinetic energy K= 1/2*m*v^2
K=(1120*45^2)/2=1134000 Joule
Answer:
Explanation:
Given
Two springs with spring constant and
(a)If they are stretched using the same force
Force
where and are the extension in the spring
so
therefore
Work done is given by
thus
(b)If they are stretched the same distance
Thus
For same extension, work done by Force 1 is more
Answer:
False
Explanation:
The magnitude of electric charge carried by an electron as well as proton is called elementary charge. Both the electron and proton have the same charge but the difference is that the electrons are negatively charged species and the protons are positively charged.
The elementary charge is equal to . Hence, the given statement "The elementary charge equals " is false.