A person consumes a snack containing 14 food calories (14kcal). what is the power this food produces if it is to be "burned off"
2 answers:
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Answer:
Tension in the string is equal to 58.33 N ( this will be the strength of the string )
Explanation:
We have given mass m = 1.7 kg
radius of the circle r = 0.48 m
Kinetic energy is given 14 J
Kinetic energy is equal to
So
v = 4.05 m/sec
Centripetal force is equal to
So tension in the string will be equal to 58.33 N ( this will be the strength of the string )
Answer:
a = 0.27 rad/s^2
Explanation:
First we will find the time t using the next equation:
θ =
where θ is the angle in radians and a is the angular aceleration. So:
0.4 =
Solving for t:
t = 0.707s
Second, with that time, we will find the angular velocity w using the next equation:
w = at
where a is the angular aceleration, so:
w = (1.6)(0.707s)
w = 1.1312 rad/s
Now, the radial aceleration is calcualted as:
=
=
= 0.166 rad/s^2
Additionally, the tangential aceleration is calculated as::
Finally, by pythagoras theorem, we find the total linear acceleration as:
a = 0.27 rad/s^2