Answer:
Explanation:
Given
height of building h=3 m
Landing velocity of diver at an angle of
Let u be the initial velocity of diver at an angle of \theta with horizontal
Since there is no acceleration in horizontal direction therefore horizontal component of velocity will remain same
---- -----1
Considering Vertical motion
here
----------------2
Divide 2 and 1 we get
Thus
Answer:
Answer C : person on an elevator going down
Explanation:
We look for a change in state of motion in order to have a net force different from zero in the system. The state of motion doesn't change in any of the examples a, b, or d. But there is a change in the state of motion in case c where initially the person and elevator where in static equilibrium, and later the elevator started going down and accelerating from zero speed to another non zero speed.
Answer:
During full moon and new moon, low tides are lowest and the high tide are at the highest.
Explanation:
The tidal bulges are the greater and tidal peak is small at full and new moon, because the tidal forces due to Sun and Moon are synchronized (and incorporate one another accordingly). Higher tides and lower tides, which are still called spring tides, are thus smaller.