Given the acceleration for a simple pendulum is
. If the acceleration of
the pendulum bob at maximum displacement is 2.5 m s−2
.
(a) Determine its
(i) angular frequency
(ii) period
(iii) amplitude.

(b) Sketch and label a graph of
(i) acceleration against displacement
(ii) displacement against time​

What is the radius of the circular path ofa charged particle in a magnetic field?

Anne applies a force on a toy car and makes it move forward. what can be said about the forces acting on the toy car at the moment anne applies the force?

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?