[" (c) "E!=0,B=0(a)E=0,B=0],[15." Show that a force that does no Work must be a velocity dependent force."]

Show that a force that does no work must be a velociy dependent force.

A factory worker pushes a 25.0 kg crate downward at an angle of 30^(@) below the horizontal a distance of 6.0 m along a level floor. (a) What magnitude of force must the worker apply to move the crate at constant velocity, if the coefficient of kinetic friction between the crate and floor is 0.3 ? (b) How much work is done on the crate by this force when the crate is pushed a distance of 6.0 m? (c) How much work is done on the crate by friction during this displacement ? (d) How much work is done by the normal force and by gracity ? (e) What is the total work done on the crate ? Take g=10m//s^(2)

Show that (E_0)/(B_0 sqrt(mu_0 epsilon_0)) = c^2

A force of 5.0 N acts on a 15 kg body initially at rest. Compute the work done by the force in (a) the first, (b) the second, and (c) the third seconds and (d) the instantaneous power due to the force at the end of the third second.

A particle is subjected to a force F_(x) that varies withes position as shown in figure. Find the work done by the force on the body as it moves (a) from x =10.0 m to x =5.0 m , (b) from x =5.0 m to x =10.0 m , (c ) from x =10. 0 m to x =15.0 m , (d) what is the total work done by the force over the distance x =0 to x =15.0 ? .

A particle is subjected to a force F_(x) that varies withes position as shown in figure. Find the work done by the force on the body as it moves (a) from x =10.0 m to x =5.0 m , (b) from x =5.0 m to x =10.0 m , (c ) from x =10. 0 m to x =15.0 m , (d) what is the total work done by the force over the distance x =0 to x =15.0 ? .