Two persons are applying forces on two opposite sides of a moving cart. The cart still moves with the same speed in the same dir
1 answer:
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The distance covered is 54.0 m
Explanation:
Since the motion of the car is a uniformly accelerated motion, we can use the following suvat equation:
where
u is the initial velocity
t is the time
a is the acceleration
s is the distance covered
For the car in this problem, we have
u = 0 (it starts from rest)
is the acceleration
t = 3.9 s is the time
Substituting, we find s:
Learn more about accelerated motion:
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Answer
Given,
Rotational inertia = 2.0 x 10-3 kg·m²
Torque = 11 N.m
time, t = 19 ms
a) Angular momentum
L is angular momentum
b) Angular velocity
We know.
The approximate total distance Earth has traveled since its birth is 3.8×10²¹m.
The Earth moves in a circular orbit of radius <em>r</em> around the Sun and it takes 1 year to go once around the Sun. Thus in a year it travels a distance equal to <em>2πr, </em>which is the circumference of the Earth's orbit.
Therefore in <em>n</em> years that have elapsed, it would travel a distance <em>d</em> given by,
Substitute 3.14 for <em>π, </em>1.5×10¹¹m for <em>r</em> and 4×10⁹ for n.
Thus, the approximate total distance Earth has traveled since its birth is 3.8×10²¹m.