A) The kinetic energy of an object is given by:
where m is the mass of the object, and v its speed. For the lion in our problem, m=45 kg and v=14.2 m/s, so its kinetic energy is
b) the increase in gravitational potential energy of the lion is given by:
where g is the gravitational acceleration, and
is the increase in altitude of the lion. In this problem,
, so the increase in gravitational potential energy is
c) When the fox reaches the top of the tree, its gravitational potential energy is
As it jumps, its kinetic energy is
So the total mechanical energy of the fox as it jumps is
Answer:
1.55 h
Explanation:
Let the time to spend over dinner be t.
Since I need to spend 10.8 h for the whole trip, then I have 10.8 - t hours left to drive.
Speed = distance/time
The distance is 549 and maximum speed is 65 mi/h.
It helps because it's being transported blah blah whatever the last person said when you first asked this question
9W 3V bulb need current flow
I = P/V = 9/3 = 3A
connected serially, voltage drop on the wire will be = Vsupply - 3(Vbulb) = 12 - 3(3) = 3V.
resistance of the wire ,with I=3 and V=3, = V/I = 3/3 = 1 Ohm.
Answer:
minimum muzzle velocity of the dart:
Explanation:
Al t time t=0, the monkey drops and the dart is shot,
For the monkey the general position equation will be:
it starts from rest so , and the acceleration is , so
(1)
it will hit the ground when y = 0:
For the dart first we need to know the time when it reaches the monkey on the horizontal position, for this we have the equation:
In this case, neglecting the air friction acceleration will be 0, and considering the origin on the gun :
(2)
So the time when it hits the monkey would be when x = 70m:
(3)
To hit the monkey before it reaches the ground it must be