Ahot-air balloon is descending at a rate of 2.3 m/s when a pas- senger drops a camera. if the camera is 41 m above the ground when it is dropped, (a) how much time does it take for the cam- era to reach the ground, and (b) what is its velocity just before it lands? let upward be the positive direction for this problem.

a) time taken = 2.66 s

b) v = 28.34

Explanation:

given,

rate of descending = 2.3 m/s

height of camera above ground = 41 m              

using equation of motion                      

4.9 t² + 2.3 t - 41 =0                      

t = 2.66 ,-3.13                    

time taken = 2.66 s

b) v² = u² + 2 g h

v² = 0 + 2× 9.8 × 41

v = 28.34                            

the electric field is a “force field” around a charged object that illustrates the direction the electric force would push an imaginary 

the higher the current the higher the mag field around it the higher the influence on the compass