Joel uses a claw hammer to remove a nail from a wall. He applies a force of 40 newtons on the hammer. The hammer applies a force
2 answers:
Answer: The mechanical advantage of the hammer is 4.
Step-by-step explanation:
We know that the mechanical advantage of the hammer is is given by the ratio between the force applied on the hammer and the force required to overcome the given force.
Force applied = 40 N
Force required= 160 N
Mechanical advantage =
Mechanical advantage =
Hence, the mechanical advantage of the hammer is 4.
You might be interested in
Answer:
Step-by-step explanation:
Given that:
the sample proportion p = 0.39
sample size = 100
Then np = 39
Using normal approximation
The sampling distribution from the sample proportion is approximately normal.
Thus, mean
The standard deviation;
The test statistics can be computed as:
From the z - tables;
(b)
Here;
the sample proportion = 0.39
the sample size n = 400
Since np = 400 * 0.39 = 156
Thus, using normal approximation.
From the sample proportion, the sampling distribution is approximate to the mean
the standard deviation
The test statistics can be computed as:
From the z - tables;
(c) The effect of the sample size on the sampling distribution is that:
As sample size builds up, the standard deviation of the sampling distribution decreases.
In addition to that, reduction in the standard deviation resulted in increases in the Z score, and the probability of having a sample proportion that is less than 30% also decreases.