What does Newton's first law of motion state? (3 points) a Every action has an equal and opposite reaction. b A body at rest wil
2 answers:
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Answer:
h=17m
v=18.6 m/s
Explanation: The question can be solved by applying kinematic equations of motion
Data
u=0
a=g
t=1.9 secs
firstly to calculate the height
to find the final velocity
The acceleration graph is straight line of equation y=9.8 as acceleration is constant:
Velocity graph is given by y=9.8x ( y as velocity and x as time):
Displacement graph is given by y=4.9x^2 ( x as time, y as displacement):
These graphs are only applicable from x=0 to x=1.9 ... ignore the other graph sections
Answer:
.
The unit of both sides of this equation are .
Explanation:
The unit of the left-hand side is , same as the unit of
.
The following makes use of the fact that for any non-zero value , the power
is equivalent to
.
On the right-hand side of this equation:
has no unit.
- The unit of
is
.
- The unit of
is
, which is equivalent to
.
- The unit of
is
.
.
Hence, the unit on the right-hand side of this equation is also .