A) The stone moves along the vertical direction by unifom accelerated motion, with acceleration equal to g (gravitational acceleration), starting from initial position h above the ground and with initial velocity equal to zero. So, its vertical position follows the law:
b) The time the stone takes to reach the ground is the time t at which its vertical position y(t) becomes zero:
and if we solve it, we find
c) Since it is a uniform accelerated motion, the velocity of the stone at time t is given by
where the initial velocity is zero:
. The stone hits the ground at t=9.6 s, so its velocity at that time is
where the negative sign means it is directed downward.
d) In this case, since the initial velocity is not zero, the position at time t is given by
where
is the initial velocity.
The time the stone takes to reach the ground is the time t such that y(t)=0, so we have:
and by solving this equation, we find
Ubiquitous in natural and engineered systems.
It's a a solid that lacks the long-range order that is characteristic of a crystal. Hope that helps. If I'm wrong just search it on google there's a lot of results. :)
Answer:
103.3 Kg
Explanation:
Use the following formula;
K.E = I/2 mv^2
529*2/(3.2)^2 =m
103.3 Kg=m
A roller coaster is stopped on a track. When the engineer presses a launch button on the coaster, the coaster moves forward. Explain this change in terms of balanced and unbalanced forces.
Frying a pancake is an example of a)conduction because the metal of the frying pan conducts heat to the pancake.