Answer:
Explanation:
Given
Force P is acting upward
C is vertical contact Force
W is the weight of the crate
As P is unable to move the Block therefore Normal reaction keeps on acting on block
thus we can say that
P-W+C=0
P=W-C
The object takes 8 s to reach a velocity of 48 m/s south
Explanation:
Since the motion of the object is a uniformly accelerated motion, we can use the following suvat equation:
v = u + at
where
v is the velocity at time t
u is the initial velocity
a is the acceleration
t is the time
For the object in this problem, choosing south as positive direction, we have:
u = 16 m/s
v = 48 m/s
So we can solve the equation for t to find the time taken for the velocity to change from 16 m/s to 48 m/s:
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