A proton (q=1.06 x 10^-19) tzveis east through a downward (into the page) magnetic field of 0.024 Tat a speed of 18 x 10'6 mis. What is the magnitude of the force acting on the proton

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.

Why do astronauts in the space shuttle weigh less?