Which situations describe unbalanced forces? Check all that apply. a baseball resting on a table a pitcher throwing a baseball a
2 answers:
Answer:
a pitcher throwing a baseball
a car accelerating downhill
a toy rocket being launched into the air
Explanation:
As per Newton's II law we know that when an object will have unbalanced force on it then it will become accelerated.
So here we know that
so in order to find the unbalanced force condition we will here find the condition of acceleration in the given all cases
a baseball resting on a table = Not accelerated so it is balanced force
a pitcher throwing a baseball = baseball is accelerated so it is unbalanced
a car stalling at a stoplight = car is at rest so no acceleration so it is balanced force
a car accelerating downhill = here its accelerating so it is unbalanced
a rubber duck floating in a bathtub = No acceleration so it is balanced force
a toy rocket being launched into the air = Accelerating so it is unbalanced
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Answer:
No, the net force on the skydiver is zero
Explanation:
According to Newton's Second Law, the net force on an object is equal to the product between the mass of the object and its acceleration:
where
F is the net force
m is the mass of the object
a is the acceleration
In this problem, the acceleration of the skydiver is zero:
a = 0
This implies that also the net force on the skydiver is zero, according to the previous equation:
F = 0
So, the net force on the skydiver is zero. This occurs because the air resistance, which points upward, exactly balances the force of gravity on the skydiver, acting downwards.
Answer:
(e)-The current is doubled.
Explanation:
According to Ohm law, where I is the current, V is the voltage and R is the resistant.
If V is doubled, while R remains constant
we would have
The current is doubled.