If you throw a baseball while riding a bike, the ball's speed relative to the ground is the sum of the bicycle's speed and the s
1 answer:
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To solve this problem we will apply the concept related to the kinetic energy theorem. Said theorem states that the work done by the net force (sum of all forces) applied to a particle is equal to the change experienced by the kinetic energy of that particle. This is:
Here,
m = mass
v = Velocity
Our values are given as,
Replacing,
Therefore the mechanical energy lost due to friction acting on the runner is 907J
Answer:
The centripetal acceleration of the runner as he runs the curved portion of the track is 0.91 m/s²
Explanation:
Given;
distance traveled in the given time = 200 m
time to cover the distance, t = 29.6 s
speed of the runner, v = d / t
v = 200 / 29.6
v = 6.757 m/s
The centripetal acceleration of the runner is given by;
where;
r is the radius of the circular arc, given as 50 m
Substitute the givens;
Therefore, the centripetal acceleration of the runner as he runs the curved portion of the track is 0.91 m/s².