what will be the restoring force if a spring with a spring constant of 45 newtons per meter is pulled 0.30 meters in the downwar
1 answer:
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Answer:
A)
B)
Explanation:
A) Using the Archimedes' force we can find the weight of water displaced:
Where:
: is the weight of the block in the air = 20.1 N
: is the weight of the block in the water = 15.3 N
Now, the mass of the water displaced is:
The volume of the block can be found using the mass of water displaced and the density of the water:
B) The density of the block can be found as follows:
I hope it helps you!
a. 46 m/s east
The jet here is moving with a uniform accelerated motion, so we can use the following suvat equation to find its velocity:
where
v is the velocity calculated at time t
u is the initial velocity
a is the acceleration
The jet in the problem has, taking east as positive direction:
u = +16 m/s is the initial velocity
is the acceleration
Substituting t = 10 s, we find the final velocity of the jet:
And since the result is positive, the direction is east.
b. 310 m
The displacement of the jet can be found using another suvat equation
where
s is the displacement
u is the initial velocity
a is the acceleration
t is the time
For the jet in this problem,
u = +16 m/s is the initial velocity
is the acceleration
t = 10 s is the time
Substituting into the equation,