A marble is placed at Location W. When the marble is released, it rolls down the track.
2 answers:
You might be interested in
Answer:
1) It expresses the rate (top speed) at which it can move with time.
2) P = 20 W
3) h = 18 km
Explanation:
1) Power is the rate of transfer of energy.
⇒ Power =
i.e P =
Thus a car's engine power is 44000W implies that the engine of the car can propel the car at this rate. This expresses the rate (top speed) at which it can move with time.
2) m = 400g = 0.4 kg
t = 20 s
h = 100m
g = 10 m/
P =
=
=
P = 20 W
3) u = 600 m/s
g = 10 m/
From the third equation of free fall,
=
- 2gh
V is the final velocity, U is the initial velocity, h is the height.
0 = - 2 x 10 x h
0 = 360000 - 20h
20h = 360000
h =
= 18000
h = 18 km
The maximum height of the bullet would be 18 km.
Answer: 600 m
Explanation:
Speed is defined as the distance traveled
in a especific time
:
Where:
is the speed of sound
the time you hear the thunder after you see the flash of lightning
We need to find the distance at which you are from the lightning strike:
Finding :
Finally: