HEL PLEAS A body is projected with an initial velocity of 40 m/s at an angle of
30 degree to the horizontal. It will cross a pole of height 20.4 m in seconds. Show work

What is the magnitude of the resultant vector round your answer to the nearest tenth

The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.