Answer:
The force exerted by the ball on the bat has a magnitude of 100 N and its direction is exactly opposite to that of the force exerted by the bat on the ball.
Explanation:
Recall that Newton's third law tells us that : "For every action, there is an equal and opposite reaction."
Therefore if the bat acts on the ball with a force of 100 N, the ball acts on the bat with a similar magnitude of force (100 N) but direction opposite to the original force.
a) The acceleration of the objects is
b) The tension in the string is 280.8 N
Explanation:
a)
We start by writing the equations of motion for the two masses attached to the pulley.
For the heavier mass, we have:
(1)
where
is the mass
is the acceleration of gravity
T is the tension in the string
a is the acceleration of the system (here we assumed that the heavier mass accelerates downward)
For the lighter mass, we have
(2)
where
T is the tension in the string
is the mass
is the acceleration of gravity
a is the acceleration of the system (here we assumed that the lighter mass accelerates upward)
From (1) we get
And substituting into (2),
b)
From the previous part of the problem we got an expression for the tension in the string:
Where we have
is the acceleration, found in part a)
Susbtituting, we find
Learn more about forces and acceleration:
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