Dane is standing on the moon holding an 8 kilogram brick 2 metres above the ground. How much energy is in the brick's gravitatio
1 answer:
The gravitational potential energy is 25.6 J
Explanation:
The gravitational potential energy (GPE) of an object is given by:
where
m is the mass of the object
g is the gravitational field strength
h is the height of the object above the ground
In this problem, we have
m = 8 kg is the mass of the brick
g = 1.6 N/kg is the gravitational field strength on the moon
h = 2 m is the height of the brick above the ground
Substituting,
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Answer:
Explanation:
The frequency of a wave is given by the following equation:
Where:
is the period
Hence:
Answer:
a) ω1 = 18rpm ω2 = -18rpm
b) ω1 = 102rpm ω2 = 138rpm
c) ω1 = ω2 = 3.18rpm
Explanation:
For the first case, we know that each wheel will spin in a different direction but with the same magnitude, so:
ωr = 6rpm This is the angular velocity of the robot
where D is 30cm and rwheel is 5cm
One velocity will be positive and the other will be negative:
ω1 = 18rpm ω2 = -18rpm
For part b, the formula is the same but distances change. Rcircle=100cm:
Replacing values, we get:
For part c, both wheels must have the same velocity: