Question 6 [8+1+1 marks]
The figure below shows a rectangular coil carrying a current, I, inside a uniform magnetic field, B,
between, N-S poles of a permanent magnet. The length and width of the coil are, a and w
respectively
N
N
S
(a). What is the magnitude and direction of force on each side (left, right, top, bottom of the coil?
Magnitude
Direction
Force location
Left
Right
Top
Bottom
(b). Along which axis is the rectangular coil rotation?
(C). Is the rotation clockwise or anticlockwise?​

An object starts from rest at point f and speeds up continuously as it moves around an oval. a. choose a point about 1/8 th of the way around the oval from point f, and label it point g. draw a vector to represent the velocity of the object at point g. b. determine the change in velocity vector   between points f and g.

Askydiver weighing 140 lb (including equipment) falls vertically downward from an altitude of 19,000 ft and opens the parachute after 18 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.55|v| when the parachute is closed and is of magnitude 14|v| when the parachute is open, where the velocity v is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. (a) find the speed of the skydiver when the parachute opens. (b) find the distance fallen before the parachute opens. (c) what is the limiting velocity vl after the parachute opens? (d) determine how long the sky diver is in the air after the parachute opens. (e) plot the graph of velocity versus time from the beginning of the fall until the skydiver reaches the ground.

The material that keeps its new shape after it is stretched is called?