A vw beetle goes from 0 to 60 mi/h with an acceleration of 2.35 m/s^2.
1 answer:
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The velocity of the brick is 39.2 m/s downward
Explanation:
The motion of the brick is a free fall motion, since the object is affected only by the force of gravity. Therefore, it has a uniformly accelerated motion towards the ground, with constant acceleration of .
So, we can find its velocity using the suvat equation:
where
v is the final velocity
u is the initial velocity
a is the acceleration
t is the time
For the brick in this problem (taking downward as positive direction)
u = 0 (it is dropped from rest)
Therefore, its velocity after t = 4.0 s is:
Downward, because the sign is positive.
Learn more about free fall motion:
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Answer:
Explanation:
As we know that box is initially at rest
So we will have
now as it will be displaced from initial position to final position then final speed of the box is reached to
now we know by work energy theorem that work done by all the forces on the box will be equal to the change in kinetic energy
So here we will have