Potential Energy = (mass) x (gravity) x (height).
But (mass) x (gravity) is 'weight', so
Potential Energy = (weight) x (height) .
The question says that the object is 25 N .
The ' N ' stands for ' Newton ' and that's a unit of force,
so we know that this is the weight of the object.
Potential Energy = (25 N) x (3 meters)
= 75 Newton-meters
= 75 Joules .
-- The circumference of the track is (2 · π · radius).
Circumference = (2 · π · 1.67m) = 10.49 meters .
-- The train's speed is (31.5 cm) / (10.49 m) of the track's circumference, per second. That's ...
(31.5 cm) · (1m / 100cm) / (10.49 m / circumference) =
(31.5 / 100 · 1,049) (cm · m / cm · m) =
= 0.030 of the circumference per second.
The train performs 0.03 revolution per second.
It takes (1/0.03) = about 33.3 seconds to complete one revolution of the track.
Answer:
The spring was compressed by 0.684 m
Explanation:
Soring constant, k = 4.75
The applied force, F = 3.25 N
Note that spring will compress back by the same distance it expands
Compression, x = ?
Using the equation F = kx
3.25 = 4.75x
x = 3.25/4.75
x = 0.684 m
The spring was compressed by 0.684 m
Answer:
720 J
Explanation:
The gravitational potential energy that Essam loses for every metre is given by:
where
m=72 kg is Essam's mass
is the gravitational field strength
is the difference in height
By substituting the numbers into the formula, we find
hi <3
i would say it is 'electricity'
hope this helps :)