Ali pushes a toy car initially at rest towards javed by exerting a constant horizontal force f of magnitude 10n through a distance of 2 meters. how much work is done onthe toy car? a 5j b) 10j c) 15j d) 20j e) 25j

d) 20J

Explanation:

Work done by a Force refers to the release of potential energy from a body that is moved by the application of that force to overcome a resistance along a path.  

It should be noted that it is a scalar magnitude, and its unit in the International System of Units is the Joule (like energy). Therefore, 1 Joule is the work done by a force of 1 Newton when moving an object, in the direction of the force, along 1 meter:  

Now, when the applied force is constant and the direction of the force and the direction of the movement are parallel, the equation to calculate it is:

(1)

When they are not parallel, both directions form an angle, let's call it . In that case the expression to calculate the Work is:  

(2)

In this case both (the force and the distance in the path) are parallel, so the work performed is the product of the force by the distance traveled . as shown in equation (1).

Hence:

>>>>This is the work

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge