Answer:
Final angular speed equals 3 revolutions per second
Explanation:
We shall use conservation of angular momentum principle to solve this problem since the angular momentum of the system is conserved
After the disc and the dropped rod form a single assembly we have the final angular momentum of the system as follows
Equating initial and final angular momentum we have
Solving for we get
Thus no of revolutions in 1 second are 6π/2π
No of revolutions are 3 revolutions per second
Augmentation or deduction of kinetic energy will tell you if any work is done here.
Explanation:
Here,
E<sub>k0</sub>=0.5mv<sub>0</sub><sup>2</sup>=16,537.5 J
E<sub>kf</sub>=0.5mv<sub>f</sub><sup>2</sup>=194,400 J
Now,
E<sub>k0</sub> - E<sub>kf</sub> = 177,862.5 J
Hence, work is done.
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the answer is A. Their is less friction between the tire and the road at position A than at position B.
The maximum height of the ball during this interval is 4.9 m (Option A)
<h3>How to determine the time to reach maximum height</h3>
The time taken to reach the maximum height can be obtained as follow:
- Time for the entire trip (T) = 2 s
- Time to reach maximum height (t) = ?
T = 2t
2 = 2t
Divide both side by 2
t = 2 / 2
t = 1 s
<h3>How to determine the maximum height reached by the ball</h3>
The maximum height reached by the ball can be obtained as follow:
- Acceleration due to gravity (g) = 9.8 m/s²
- Time to reach maximum height (t) =?
- Maximum height (h) =?
h = ½gt²
h = ½ × 9.8 × 1²
h = ½ × 9.8 × 1
h = 4.9 m
Thus, the maximum height reached by the ball is 4.9 m (Option A)
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Answer:
Th average force impact is
Explanation:
From the question we are told that
The mass of the golf ball is
The angle made is
The range of the golf ball is
The duration of contact is
Generally the range of the golf ball is mathematically represented as
Here v is the velocity with which the golf club propelled it with, making v the subject
=>
=>
Generally the change in momentum of the golf ball is mathematically represented as
here u is the initial velocity of the ball before being stroked and the value is 0 m/s
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Generally the average force of impact is mathematically represented as
=>
=>